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class="vector-toc-numb">2</span> <span>Cultural examples by regions</span> </div> </a> <button aria-controls="toc-Cultural_examples_by_regions-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Cultural examples by regions subsection</span> </button> <ul id="toc-Cultural_examples_by_regions-sublist" class="vector-toc-list"> <li id="toc-In_Mainland_China" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#In_Mainland_China"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>In Mainland China</span> </div> </a> <ul id="toc-In_Mainland_China-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-In_Hong_Kong" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#In_Hong_Kong"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>In Hong Kong</span> </div> </a> <ul id="toc-In_Hong_Kong-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-In_Japan" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#In_Japan"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>In Japan</span> </div> </a> <ul id="toc-In_Japan-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-In_Taiwan" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#In_Taiwan"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.4</span> <span>In Taiwan</span> </div> </a> <ul id="toc-In_Taiwan-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-In_Malaysia" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#In_Malaysia"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.5</span> <span>In Malaysia</span> </div> </a> <ul id="toc-In_Malaysia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-In_Singapore" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#In_Singapore"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.6</span> <span>In Singapore</span> </div> </a> <ul id="toc-In_Singapore-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-In_Indonesia" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#In_Indonesia"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.7</span> <span>In Indonesia</span> </div> </a> <ul id="toc-In_Indonesia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-In_Vietnam" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#In_Vietnam"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.8</span> <span>In Vietnam</span> </div> </a> <ul id="toc-In_Vietnam-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-In_South_Korea" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#In_South_Korea"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.9</span> <span>In South Korea</span> </div> </a> <ul id="toc-In_South_Korea-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Outside_Asia" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Outside_Asia"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.10</span> <span>Outside Asia</span> </div> </a> <ul id="toc-Outside_Asia-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Corporate_examples" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Corporate_examples"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Corporate examples</span> </div> </a> <button aria-controls="toc-Corporate_examples-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Corporate examples subsection</span> </button> <ul id="toc-Corporate_examples-sublist" class="vector-toc-list"> <li id="toc-Nokia" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Nokia"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Nokia</span> </div> </a> <ul id="toc-Nokia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-SaskTel" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#SaskTel"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>SaskTel</span> </div> </a> <ul id="toc-SaskTel-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-OnePlus" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#OnePlus"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>OnePlus</span> </div> </a> <ul id="toc-OnePlus-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Research" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Research"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Research</span> </div> </a> <ul id="toc-Research-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-In_popular_culture" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#In_popular_culture"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>In popular culture</span> </div> </a> <ul id="toc-In_popular_culture-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Tetraphobia</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 44 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-44" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">44 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Tetrafobia" title="Tetrafobia – Asturian" lang="ast" hreflang="ast" data-title="Tetrafobia" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Tetrafobiya" title="Tetrafobiya – Azerbaijani" lang="az" hreflang="az" data-title="Tetrafobiya" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Kia%E2%81%BF_4" title="Kiaⁿ 4 – Minnan" lang="nan" hreflang="nan" data-title="Kiaⁿ 4" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A2%D0%B5%D1%82%D1%80%D0%B0%D1%84%D0%BE%D0%B1%D0%B8%D1%8F" title="Тетрафобия – Bulgarian" lang="bg" hreflang="bg" data-title="Тетрафобия" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Tetrafobija" title="Tetrafobija – Bosnian" lang="bs" hreflang="bs" data-title="Tetrafobija" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Tetraf%C3%B2bia" title="Tetrafòbia – Catalan" lang="ca" hreflang="ca" data-title="Tetrafòbia" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Tetrafobie" title="Tetrafobie – Czech" lang="cs" hreflang="cs" data-title="Tetrafobie" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Tetraphobie" title="Tetraphobie – German" lang="de" hreflang="de" data-title="Tetraphobie" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Tetrafoobia" title="Tetrafoobia – Estonian" lang="et" hreflang="et" data-title="Tetrafoobia" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Tetrafobia" title="Tetrafobia – Spanish" lang="es" hreflang="es" data-title="Tetrafobia" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Kvarfobio" title="Kvarfobio – Esperanto" lang="eo" hreflang="eo" data-title="Kvarfobio" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/T%C3%A9traphobie" title="Tétraphobie – French" lang="fr" hreflang="fr" data-title="Tétraphobie" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Tetrafobia" title="Tetrafobia – Galician" lang="gl" hreflang="gl" data-title="Tetrafobia" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-hak mw-list-item"><a href="https://hak.wikipedia.org/wiki/Ki%C3%A2ng_4" title="Kiâng 4 – Hakka Chinese" lang="hak" hreflang="hak" data-title="Kiâng 4" data-language-autonym="客家語 / Hak-kâ-ngî" data-language-local-name="Hakka Chinese" class="interlanguage-link-target"><span>客家語 / Hak-kâ-ngî</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/4%EC%9E%90_%EA%B8%88%EA%B8%B0" title="4자 금기 – Korean" lang="ko" hreflang="ko" data-title="4자 금기" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%8F%D5%A5%D5%BF%D6%80%D5%A1%D6%86%D5%B8%D5%A2%D5%AB%D5%A1" title="Տետրաֆոբիա – Armenian" lang="hy" hreflang="hy" data-title="Տետրաֆոբիա" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Tetrafobija" title="Tetrafobija – Croatian" lang="hr" hreflang="hr" data-title="Tetrafobija" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Tetrafobia" title="Tetrafobia – Indonesian" lang="id" hreflang="id" data-title="Tetrafobia" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Tetrafobia" title="Tetrafobia – Italian" lang="it" hreflang="it" data-title="Tetrafobia" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A4%D7%97%D7%93_%D7%9E%D7%94%D7%A1%D7%A4%D7%A8%D7%94_%D7%90%D7%A8%D7%91%D7%A2" title="פחד מהספרה ארבע – Hebrew" lang="he" hreflang="he" data-title="פחד מהספרה ארבע" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-lo mw-list-item"><a href="https://lo.wikipedia.org/wiki/%E0%BA%AD%E0%BA%B2%E0%BA%81%E0%BA%B2%E0%BA%99%E0%BA%81%E0%BA%BB%E0%BA%A7%E0%BB%80%E0%BA%A5%E0%BA%81%E0%BA%AA%E0%BA%B5%E0%BB%88" title="ອາການກົວເລກສີ່ – Lao" lang="lo" hreflang="lo" data-title="ອາການກົວເລກສີ່" data-language-autonym="ລາວ" data-language-local-name="Lao" class="interlanguage-link-target"><span>ລາວ</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Tetraphobie" title="Tetraphobie – Luxembourgish" lang="lb" hreflang="lb" data-title="Tetraphobie" data-language-autonym="Lëtzebuergesch" data-language-local-name="Luxembourgish" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Tetrafobie" title="Tetrafobie – Limburgish" lang="li" hreflang="li" data-title="Tetrafobie" data-language-autonym="Limburgs" data-language-local-name="Limburgish" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Tetraf%C3%B3bia" title="Tetrafóbia – Hungarian" lang="hu" hreflang="hu" data-title="Tetrafóbia" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%9F%E0%B5%86%E0%B4%9F%E0%B5%8D%E0%B4%B0%E0%B4%BE%E0%B4%AB%E0%B5%8B%E0%B4%AC%E0%B4%BF%E0%B4%AF" title="ടെട്രാഫോബിയ – Malayalam" lang="ml" hreflang="ml" data-title="ടെട്രാഫോബിയ" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Tetrafobia" title="Tetrafobia – Malay" lang="ms" hreflang="ms" data-title="Tetrafobia" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/Gi%C4%83ng_4" title="Giăng 4 – Mindong" lang="cdo" hreflang="cdo" data-title="Giăng 4" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="Mindong" class="interlanguage-link-target"><span>閩東語 / Mìng-dĕ̤ng-ngṳ̄</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%9B%9B%E3%81%AE%E5%AD%97" title="四の字 – Japanese" lang="ja" hreflang="ja" data-title="四の字" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Tetrafobia" title="Tetrafobia – Polish" lang="pl" hreflang="pl" data-title="Tetrafobia" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Tetrafobia" title="Tetrafobia – Portuguese" lang="pt" hreflang="pt" data-title="Tetrafobia" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A2%D0%B5%D1%82%D1%80%D0%B0%D1%84%D0%BE%D0%B1%D0%B8%D1%8F" title="Тетрафобия – Russian" lang="ru" hreflang="ru" data-title="Тетрафобия" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Tetraphobia" title="Tetraphobia – Simple English" lang="en-simple" hreflang="en-simple" data-title="Tetraphobia" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A2%D0%B5%D1%82%D1%80%D0%B0%D1%84%D0%BE%D0%B1%D0%B8%D1%98%D0%B0" title="Тетрафобија – Serbian" lang="sr" hreflang="sr" data-title="Тетрафобија" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Tetrafobija" title="Tetrafobija – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Tetrafobija" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Tetrafobia" title="Tetrafobia – Finnish" lang="fi" hreflang="fi" data-title="Tetrafobia" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Tetrafobi" title="Tetrafobi – Swedish" lang="sv" hreflang="sv" data-title="Tetrafobi" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%AD%E0%B8%B2%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%81%E0%B8%A5%E0%B8%B1%E0%B8%A7%E0%B9%80%E0%B8%A5%E0%B8%82%E0%B8%AA%E0%B8%B5%E0%B9%88" title="อาการกลัวเลขสี่ – Thai" lang="th" hreflang="th" data-title="อาการกลัวเลขสี่" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Tetrafobi" title="Tetrafobi – Turkish" lang="tr" hreflang="tr" data-title="Tetrafobi" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A2%D0%B5%D1%82%D1%80%D0%B0%D1%84%D0%BE%D0%B1%D1%96%D1%8F" title="Тетрафобія – Ukrainian" lang="uk" hreflang="uk" data-title="Тетрафобія" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vep mw-list-item"><a href="https://vep.wikipedia.org/wiki/Tetrafobii" title="Tetrafobii – Veps" lang="vep" hreflang="vep" data-title="Tetrafobii" data-language-autonym="Vepsän kel’" data-language-local-name="Veps" class="interlanguage-link-target"><span>Vepsän kel’</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/H%E1%BB%99i_ch%E1%BB%A9ng_s%E1%BB%A3_s%E1%BB%91_b%E1%BB%91n" title="Hội chứng sợ số bốn – Vietnamese" lang="vi" hreflang="vi" data-title="Hội chứng sợ số bốn" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E5%9B%9B%E4%B8%AA%E7%A6%81%E5%BF%8C" title="四个禁忌 – Wu" lang="wuu" hreflang="wuu" data-title="四个禁忌" data-language-autonym="吴语" data-language-local-name="Wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E5%9B%9B%E5%98%85%E7%A6%81%E5%BF%8C" title="四嘅禁忌 – Cantonese" lang="yue" hreflang="yue" data-title="四嘅禁忌" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%9B%9B%E7%9A%84%E7%A6%81%E5%BF%8C" title="四的禁忌 – Chinese" lang="zh" hreflang="zh" data-title="四的禁忌" data-language-autonym="中文" data-language-local-name="Chinese" 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id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Avoidance of the number four in many East Asian nations</div> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-More_citations_needed plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/Tetraphobia" title="Special:EditPage/Tetraphobia">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Tetraphobia%22">"Tetraphobia"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Tetraphobia%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Tetraphobia%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Tetraphobia%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Tetraphobia%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Tetraphobia%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">August 2024</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <p class="mw-empty-elt"> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:ShanghaiMissingFloors_(cropped).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/0f/ShanghaiMissingFloors_%28cropped%29.jpg/170px-ShanghaiMissingFloors_%28cropped%29.jpg" decoding="async" width="170" height="186" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/0/0f/ShanghaiMissingFloors_%28cropped%29.jpg 1.5x" data-file-width="246" data-file-height="269" /></a><figcaption>An elevator control panel in a residential apartment building in Shanghai with no floor numbered as the 4th</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Shizuoka_Missing_Parking_Lot.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Shizuoka_Missing_Parking_Lot.JPG/220px-Shizuoka_Missing_Parking_Lot.JPG" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Shizuoka_Missing_Parking_Lot.JPG/330px-Shizuoka_Missing_Parking_Lot.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Shizuoka_Missing_Parking_Lot.JPG/440px-Shizuoka_Missing_Parking_Lot.JPG 2x" data-file-width="4288" data-file-height="3216" /></a><figcaption>The number 4 missing in a parking lot in Japan</figcaption></figure> <p><b>Tetraphobia</b> (from <a href="/wiki/Ancient_Greek_language" class="mw-redirect" title="Ancient Greek language">Ancient Greek</a> <i> </i>τετράς<i> (tetrás)</i> 'four' and <a href="/wiki/Ancient_Greek_language" class="mw-redirect" title="Ancient Greek language">Ancient Greek</a> <i> </i>φόβος<i> (phóbos)</i> 'fear') is the practice of avoiding instances of the digit <a href="/wiki/4_(number)" class="mw-redirect" title="4 (number)">4</a>. It is a <a href="/wiki/Superstition" title="Superstition">superstition</a> most common in <a href="/wiki/East_Asia" title="East Asia">East Asian</a> nations and is associated with death.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Rationale">Rationale</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=1" title="Edit section: Rationale"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable floatright" style="text-align:center;"> <tbody><tr> <th rowspan="2">Language</th> <th colspan="2">Reading </th></tr> <tr> <th>四<br />(four)<br /></th> <th>死<br />(die) </th></tr> <tr> <th><a href="/wiki/Sino-Tibetan_languages" title="Sino-Tibetan languages">Proto-Sino-Tibetan</a> </th> <td>*b-ləj</td> <td>*səj </td></tr> <tr> <th><a href="/wiki/Old_Chinese" title="Old Chinese">Old Chinese</a> </th> <td>/*s.lij-s/</td> <td>/*sijʔ/ </td></tr> <tr> <th><a href="/wiki/Middle_Chinese" title="Middle Chinese">Middle Chinese</a> </th> <td>/siɪ<sup>H</sup>/</td> <td>/sˠiɪ<sup>X</sup>/ </td></tr> <tr> <th><a href="/wiki/Mandarin_Chinese" title="Mandarin Chinese">Mandarin Chinese</a> </th> <td>sì</td> <td>sǐ </td></tr> <tr> <th><a href="/wiki/Shanghainese" title="Shanghainese">Shanghainese</a> </th> <td>sy²</td> <td>shi², sy² </td></tr> <tr> <th><a href="/wiki/Cantonese" title="Cantonese">Cantonese</a> </th> <td>sei³</td> <td>sei² </td></tr> <tr> <th><a href="/wiki/Hakka_Chinese" title="Hakka Chinese">Hakka</a> </th> <td>si³</td> <td>si⁴ </td></tr> <tr> <th><a href="/wiki/Hokkien" title="Hokkien">Hokkien</a> </th> <td>sì, sù</td> <td>sí, sú </td></tr> <tr> <th><a href="/wiki/Vietnamese_language" title="Vietnamese language">Vietnamese</a> </th> <td>tư, tứ</td> <td>tử </td></tr> <tr> <th><a href="/wiki/Korean_language" title="Korean language">Korean</a> </th> <td>sa</td> <td>sa </td></tr> <tr> <th><a href="/wiki/Japanese_language" title="Japanese language">Japanese</a> </th> <td>shi</td> <td>shi </td></tr> </tbody></table> <p>The <a href="/wiki/Chinese_language" title="Chinese language">Chinese</a> word for "four" (<a href="https://en.wiktionary.org/wiki/%E5%9B%9B" class="extiw" title="wikt:四">四</a>, <a href="/wiki/Pinyin" class="mw-redirect" title="Pinyin">pinyin</a>: sì, <a href="/wiki/Jyutping" title="Jyutping">jyutping</a>: sei<sup>3</sup>) sounds quite similar to the word for "<a href="/wiki/Death" title="Death">death</a>" (<a href="https://en.wiktionary.org/wiki/%E6%AD%BB" class="extiw" title="wikt:死">死</a>, <a href="/wiki/Pinyin" class="mw-redirect" title="Pinyin">pinyin</a>: sǐ, <a href="/wiki/Jyutping" title="Jyutping">jyutping</a>: sei<sup>2</sup>) in many <a href="/wiki/Varieties_of_Chinese" title="Varieties of Chinese">varieties of Chinese</a>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup class="noprint Inline-Template noprint noexcerpt Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:NOTRS" class="mw-redirect" title="Wikipedia:NOTRS"><span title="This source cites the exact Baskerville effect study that's said to be debunked in a section below this one, Research. (August 2024)">better source needed</span></a></i>]</sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Similarly, the <a href="/wiki/Sino-Japanese_vocabulary" title="Sino-Japanese vocabulary">Sino-Japanese</a>, <a href="/wiki/Sino-Korean_vocabulary" title="Sino-Korean vocabulary">Sino-Korean</a> and <a href="/wiki/Sino-Vietnamese_vocabulary" title="Sino-Vietnamese vocabulary">Sino-Vietnamese</a> words for "four", shi (し, <a href="/wiki/Japanese_language" title="Japanese language">Japanese</a>) and sa (사, <a href="/wiki/Korean_language" title="Korean language">Korean</a>), sound similar or identical to "death" in each language (see <a href="/wiki/Korean_numerals" title="Korean numerals">Korean numerals</a>, <a href="/wiki/Japanese_numerals" title="Japanese numerals">Japanese numerals</a>, <a href="/wiki/Vietnamese_numerals" title="Vietnamese numerals">Vietnamese numerals</a>). Tetraphobia is known to occur in Korea and Japan since the two words sound identical, but not at all in Vietnam because they carry different <a href="/wiki/Vietnamese_phonology#Tone" title="Vietnamese phonology">tones</a> (in the case of the word for "four", whether it is the Sino-Vietnamese reading <i>tứ</i> or the more common non-Sino-Vietnamese reading <i>tư</i>, neither sounds like the word for "death" which is <i>tử</i>) and Vietnamese does not use Sino-Vietnamese numerals as often in the first place. </p><p>Tetraphobia far surpasses <a href="/wiki/Triskaidekaphobia" title="Triskaidekaphobia">triskaidekaphobia</a> (Western superstitions around the number 13). It even permeates the business world in these regions of Asia.<sup id="cite_ref-TetraBiz_4-0" class="reference"><a href="#cite_note-TetraBiz-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Cultural_examples_by_regions">Cultural examples by regions</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=2" title="Edit section: Cultural examples by regions"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="In_Mainland_China">In Mainland China</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=3" title="Edit section: In Mainland China"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Numbers_in_Chinese_culture#Unlucky_numbers" class="mw-redirect" title="Numbers in Chinese culture">Numbers in Chinese culture § Unlucky numbers</a></div> <p>Chinese is a tonal language with a comparatively small inventory of permitted syllables, resulting in an exceptionally large number of <a href="/wiki/Homophone" title="Homophone">homophone</a> words. Many of the numbers are homophones or near-homophones of other words and have therefore acquired superstitious meanings. </p><p>The Chinese avoid phone numbers and addresses with fours because the pronunciation in "four" and "death" differ only in tone, especially when a combination with another number sounds similar to undesirable expressions. Example: "94" could be interpreted as "certain death"<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (August 2024)">citation needed</span></a></i>]</sup> </p><p>The tetraphobia is not apparent for the military and government institutions of the <a href="/wiki/People%27s_Republic_of_China" class="mw-redirect" title="People's Republic of China">People's Republic of China</a>. <a href="/wiki/Chinese_Communist_Party" title="Chinese Communist Party">Chinese Communist Party</a> and <a href="/wiki/People%27s_Liberation_Army" title="People's Liberation Army">People's Liberation Army</a> make free use of the number 4 in many military designations for equipment, with examples including the <a href="/wiki/Dongfeng-4" class="mw-redirect" title="Dongfeng-4">Dongfeng-4</a> ICBM, <a href="/wiki/Type_094_submarine" title="Type 094 submarine">Type 094 submarine</a>, and <a href="/wiki/Type_054A_frigate" title="Type 054A frigate">Type 054A frigate</a>. Chinese government policies also usually contain the number 4 for expression.<sup id="cite_ref-SecT_5-0" class="reference"><a href="#cite_note-SecT-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> By contrast, the navies of the <a href="/wiki/Republic_of_China_Navy" title="Republic of China Navy">Republic of China</a> (Taiwan)<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (August 2024)">citation needed</span></a></i>]</sup> and of <a href="/wiki/Republic_of_Korea_Navy" title="Republic of Korea Navy">South Korea</a> refrain from using the number 4 when assigning <a href="/wiki/Pennant_number" title="Pennant number">pennant numbers</a> to their ships. </p><p>While in <a href="/wiki/Mandarin_Chinese" title="Mandarin Chinese">Mandarin</a>-speaking regions in China, 14 and 74 are considered unluckier than the individual 4, because 14 (十四, pinyin: shí sì) sounds like "is dead" (是死, pinyin: shì sǐ) and because in some forms of the language, 1 is pronounced (yao) which sounds like (yào 要), which means will be, when combined, it sounds like will be dead. 74 (七十四, pinyin: qī shí sì or colloquially 七四, pinyin: qī sǐ) sounds like "actually dead" (其实死, pinyin: qí shí sǐ) or "angered to death" (气死, pinyin: qì sǐ). </p><p>When <a href="/wiki/Beijing" title="Beijing">Beijing</a> lost its bid to stage the <a href="/wiki/2000_Olympic_Games" class="mw-redirect" title="2000 Olympic Games">2000 Olympic Games</a>, it was speculated that the reason China did not pursue a bid for the following <a href="/wiki/2004_Summer_Olympics" title="2004 Summer Olympics">2004 Games</a> was the unpopularity of the number 4 in China. Instead, the city waited another four years, and would eventually host the <a href="/wiki/2008_Olympic_Games" class="mw-redirect" title="2008 Olympic Games">2008 Olympic Games</a>, the number eight being a lucky number in Chinese culture. </p><p>In recent years China has also avoided using the number 4 in aircraft registrations. An example is China Southern Airlines, with their A330s. One A330 is registered as B-8363, while the next is B-8365 and following B-8366. After B-8366 there is B-1062, B-1063 then B-1065, to avoid using the number 4 as in B-8364 and 1064. However, this policy only applies for aircraft that end with 4, so one will see B-8426 but not B-8264.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="In_Hong_Kong">In Hong Kong</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=4" title="Edit section: In Hong Kong"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Phone_numbers_for_sale_in_Hong_Kong.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Phone_numbers_for_sale_in_Hong_Kong.JPG/220px-Phone_numbers_for_sale_in_Hong_Kong.JPG" decoding="async" width="220" height="147" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Phone_numbers_for_sale_in_Hong_Kong.JPG/330px-Phone_numbers_for_sale_in_Hong_Kong.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Phone_numbers_for_sale_in_Hong_Kong.JPG/440px-Phone_numbers_for_sale_in_Hong_Kong.JPG 2x" data-file-width="5760" data-file-height="3840" /></a><figcaption>Phone numbers for sale in Hong Kong, containing a lot of fours</figcaption></figure> <p>In <a href="/wiki/Hong_Kong" title="Hong Kong">Hong Kong</a>, some apartments such as Vista Paradiso and <a href="/wiki/Union_Square_(Hong_Kong)#The_Arch" title="Union Square (Hong Kong)">The Arch</a> skip all the floors from 40 to 49, which is the entire 40s. Immediately above the 39th floor is the 50th floor, leading many who are not aware of tetraphobia to believe that some floors are missing. Tetraphobia is not the main reason, but rather as an excuse to have apartments with 'higher' floors, thus increasing the price, because higher floors in Hong Kong apartments are usually more expensive (see <a href="/wiki/39_Conduit_Road" title="39 Conduit Road">39 Conduit Road</a>). For <a href="/wiki/Cantonese" title="Cantonese">Cantonese</a> speakers, 14 and 24 are considered unluckier than the individual 4, because 14 (<a href="/wiki/Yale_romanization_of_Cantonese" title="Yale romanization of Cantonese">Cantonese Yale</a>: <i><span lang="yue-Latn">sahp sei</span></i>) sounds like "will certainly die" (<span title="Chinese-language text"><span lang="zh-HK">實死</span></span>, <a href="/wiki/Yale_romanization_of_Cantonese" title="Yale romanization of Cantonese">Cantonese Yale</a>: <i><span lang="yue-Latn">saht séi</span></i>), and 24 (<a href="/wiki/Yale_romanization_of_Cantonese" title="Yale romanization of Cantonese">Cantonese Yale</a>: <i><span lang="yue-Latn">yih sei</span></i>) sounds like "easy to die" (<span title="Chinese-language text"><span lang="zh-HK">易死</span></span>, <a href="/wiki/Yale_romanization_of_Cantonese" title="Yale romanization of Cantonese">Cantonese Yale</a>: <i><span lang="yue-Latn">yih séi</span></i>). </p><p>Due to the blending of East Asian and Western cultures, it is possible in some buildings that both the <a href="/wiki/Thirteenth_floor" class="mw-redirect" title="Thirteenth floor">thirteenth floor</a> and the fourteenth floor are skipped, causing the twelfth floor to precede the fifteenth floor, along with all the other 4s. Thus, a building whose top floor is numbered 100 could have just eighty floors. </p> <div class="mw-heading mw-heading3"><h3 id="In_Japan">In Japan</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=5" title="Edit section: In Japan"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In Japan, the number 4 is avoided in some apartments and hospitals. The number 49 is also considered unlucky, as its pronunciation is similar to the Japanese term <i>shiku</i>, meaning 'to suffer and die'.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="In_Taiwan">In Taiwan</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=6" title="Edit section: In Taiwan"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In Taiwan, not using house numbers ending in 4 without also skipping numbers on the opposite side of the road often results in the numbers on two sides of a street getting more and more out of sync as one advances.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="In_Malaysia">In Malaysia</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=7" title="Edit section: In Malaysia"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In <a href="/wiki/Malaysia" title="Malaysia">Malaysia</a>, especially in regions or neighbourhoods where ethnic Chinese are significant in population, the floor number 4 or house address with number 4 is occasionally skipped. The practice is more prevalent in private condominiums, especially those built by ethnic Chinese-owned companies. The fourth floor may be either omitted completely or substituted with "3A". </p> <div class="mw-heading mw-heading3"><h3 id="In_Singapore">In Singapore</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=8" title="Edit section: In Singapore"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Singaporean public transport operator <a href="/wiki/SBS_Transit" title="SBS Transit">SBS Transit</a> has omitted the number plates for some of its buses whose numbers end with "4" due to this, so if a bus is registered as SBS***3*, SBS***4* will be omitted and the next bus to be registered will be SBS***5*.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> Note that this only applies to certain buses and not others and that the final asterisk is the checksum letter and not a number. For example, if the bus is registered as SBS8603J, SBS8604G will be omitted and the next bus to be registered will be SBS8605D. </p><p>Singaporean public transport operator <a href="/wiki/SMRT_Corporation" title="SMRT Corporation">SMRT</a> has omitted the "4" as the first digit of the serial number of the train cars as well as the <a href="/wiki/SMRT_Buses" title="SMRT Buses">SMRT Buses</a> NightRider services <sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (November 2015)">citation needed</span></a></i>]</sup>. </p> <div class="mw-heading mw-heading3"><h3 id="In_Indonesia">In Indonesia</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=9" title="Edit section: In Indonesia"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In <a href="/wiki/Indonesia" title="Indonesia">Indonesia</a> since the 2000s, an increasing number of skyscrapers skip floors ending with, or containing implicit references to, the number 4 (as well as the 13th floor), especially in those funded by <a href="/wiki/Chinese_Indonesians" title="Chinese Indonesians">Chinese Indonesians</a>. For example, in <a href="/wiki/The_Plaza_Semanggi" class="mw-redirect" title="The Plaza Semanggi">Plaza Semanggi</a> (owned by <a href="/wiki/Lippo_Group" title="Lippo Group">Lippo Group</a>, which was founded by Chinese Indonesian <a href="/wiki/Mochtar_Riady" title="Mochtar Riady">Mochtar Riady</a>), 4th floor is replaced by 3A. In <a href="/wiki/The_Energy_Tower" title="The Energy Tower">The Energy Tower</a> and most high-rises developed by Agung Sedayu Propertindo, 39th floor is followed by 50th floor. Some buildings, mostly owned by non-Chinese, have a 4th floor. Examples are government buildings, the <a href="/wiki/Sarinah" title="Sarinah">Sarinah</a> department store, and most buildings developed by <a href="/wiki/State-owned_enterprises_of_Indonesia" title="State-owned enterprises of Indonesia">Indonesian state-owned enterprises</a>. </p> <div class="mw-heading mw-heading3"><h3 id="In_Vietnam">In Vietnam</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=10" title="Edit section: In Vietnam"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In <a href="/wiki/Vietnam" title="Vietnam">Vietnam</a>, the <a href="/wiki/Sino-Vietnamese_vocabulary" title="Sino-Vietnamese vocabulary">Sino-Vietnamese</a> words for "four" (<span title="Vietnamese-language text"><i lang="vi">tứ</i></span> or <span title="Vietnamese-language text"><i lang="vi">tư</i></span>) are used more in formal contexts or in reference to the days of the week like referring to "Wednesday" (<span title="Vietnamese-language text"><i lang="vi">thứ tư</i></span>). When spoken, its sound is differentiated clearly from the word for "death" (<span title="Vietnamese-language text"><i lang="vi">tử</i></span>). <span title="Vietnamese-language text"><i lang="vi">Tử</i></span> is also used in formal contexts and proper nouns, <span title="Vietnamese-language text"><i lang="vi">tư</i></span> and <span title="Vietnamese-language text"><i lang="vi">tử</i></span> have to be used in compounds like <span title="Vietnamese-language text"><i lang="vi">bất tử</i></span> (immortal) or <span title="Vietnamese-language text"><i lang="vi">Tứ Xuyên</i></span> (<a href="/wiki/Sichuan" title="Sichuan">Sichuan</a>). The word <span title="Vietnamese-language text"><i lang="vi">bốn</i></span> is often used much more in the place of <span title="Vietnamese-language text"><i lang="vi">tư</i></span> to refer to the number 4. Tetraphobia does not occur in Vietnam as the Sino-Vietnamese words for four and death aren't as commonly used or associated with death in place of the native word for death <span title="Vietnamese-language text"><i lang="vi">"chết"</i></span>.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (October 2022)">citation needed</span></a></i>]</sup> Its native Vietnamese equivalents, <span title="Vietnamese-language text"><i lang="vi">bốn</i></span> (four) and <span title="Vietnamese-language text"><i lang="vi">chết</i></span> (death), are the words mainly used for death and four. </p> <div class="mw-heading mw-heading3"><h3 id="In_South_Korea">In South Korea<span class="anchor" id="korea"></span></h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=11" title="Edit section: In South Korea"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:No_4th_Floor_(3760622276).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d9/No_4th_Floor_%283760622276%29.jpg/220px-No_4th_Floor_%283760622276%29.jpg" decoding="async" width="220" height="124" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d9/No_4th_Floor_%283760622276%29.jpg/330px-No_4th_Floor_%283760622276%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d9/No_4th_Floor_%283760622276%29.jpg/440px-No_4th_Floor_%283760622276%29.jpg 2x" data-file-width="3648" data-file-height="2056" /></a><figcaption>4th floor labelled "F", 13th floor labelled as usual</figcaption></figure> <p>In <a href="/wiki/South_Korea" title="South Korea">South Korea</a>, tetraphobia is less extreme. The number 4 sounds like the hanja for "death" (<span title="Korean-language text"><span lang="ko">사</span></span>) (although Korean has no tones), so the floor number 4 or room number 4 is almost always skipped in hospitals, funeral halls, and similar public buildings. In other buildings, the fourth floor is sometimes labelled "F" (for "Four") instead of "4" in elevators. Apartment numbers containing multiple occurrences of the number 4 (such as 404) are likely to be avoided to an extent that the value of the property is adversely affected. The national railroad, <a href="/wiki/Korail" title="Korail">Korail</a>, left out the locomotive number 4444 when numbering a locomotive class from 4401 upwards. </p> <div class="mw-heading mw-heading3"><h3 id="Outside_Asia">Outside Asia</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=12" title="Edit section: Outside Asia"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Efforts to accommodate tetraphobia-related sensitivities have been seen in <a href="/wiki/Canada" title="Canada">Canada</a>, which has a significant population of <a href="/wiki/Chinese_Canadians" title="Chinese Canadians">Chinese descent</a>. <a href="/wiki/Richmond_Hill,_Ontario" title="Richmond Hill, Ontario">Richmond Hill, Ontario</a> banned the number four on new houses in June 2013. Property developers in <a href="/wiki/Vancouver" title="Vancouver">Vancouver</a> omitted the number from new buildings until October 2015, when the city banned non-sequential numbering schemes.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p><p>In the <a href="/wiki/Aria_Hotel" class="mw-redirect" title="Aria Hotel">Aria Hotel</a> in <a href="/wiki/Las_Vegas" title="Las Vegas">Las Vegas</a>, among others, numbers 40-49 are skipped for the same reasons they may be omitted in China. </p><p>In some <a href="/wiki/Italy" title="Italy">Italian</a> regions (e.g. <a href="/wiki/Tuscany" title="Tuscany">Tuscany</a>) four means <a href="/wiki/Coffin" title="Coffin">coffin</a> and thus it is feared.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Corporate_examples">Corporate examples</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=13" title="Edit section: Corporate examples"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Nokia">Nokia</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=14" title="Edit section: Nokia"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The software platform <a href="/wiki/Symbian" title="Symbian">Symbian</a>, used by <a href="/wiki/Finland" title="Finland">Finnish</a> telecommunications firm <a href="/wiki/Nokia" title="Nokia">Nokia</a> in their <a href="/wiki/S60_(software_platform)" title="S60 (software platform)">Series 60</a> platform, avoids releases beginning with 4, as it did when it was EPOC and owned by <a href="/wiki/Psion_(computers)" class="mw-redirect" title="Psion (computers)">Psion</a> (there was no Psion Series 4, and there was no 4th edition of S60). This was done "as a polite gesture to Asian customers".<sup id="cite_ref-s60tetraphobia_13-0" class="reference"><a href="#cite_note-s60tetraphobia-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Mahoney_14-0" class="reference"><a href="#cite_note-Mahoney-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> Similarly, Nokia did not release any products under the 4xxx series, although some of Nokia's other products do contain the number 4, such as the <a href="/wiki/Series_40" title="Series 40">Series 40</a> platform, and the <a href="/wiki/Nokia_3410" title="Nokia 3410">Nokia 3410</a>. However, as of the <a href="/wiki/Mobile_World_Congress" title="Mobile World Congress">Mobile World Congress</a> 2019 event, the company had announced the Nokia 4.2. </p> <div class="mw-heading mw-heading3"><h3 id="SaskTel">SaskTel</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=15" title="Edit section: SaskTel"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>When <a href="/wiki/Area_code_306" class="mw-redirect" title="Area code 306">area code 306</a> was nearing exhaustion in 2011, the <a href="/wiki/Canadian_Radio-television_and_Telecommunications_Commission" title="Canadian Radio-television and Telecommunications Commission">Canadian Radio-television and Telecommunications Commission</a> originally proposed that the new area code be 474.<sup id="cite_ref-CRTC_15-0" class="reference"><a href="#cite_note-CRTC-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> However, representatives from <a href="/wiki/SaskTel" title="SaskTel">SaskTel</a> requested that the new area code be 639 instead, to avoid the negative connotations of 4 in Asian cultures. 639 was subsequently approved as the new area code.<sup id="cite_ref-cbc_16-0" class="reference"><a href="#cite_note-cbc-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="OnePlus">OnePlus</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=16" title="Edit section: OnePlus"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Chinese <a href="/wiki/Smartphone" title="Smartphone">smartphone</a> manufacturer <a href="/wiki/OnePlus" title="OnePlus">OnePlus</a> chose to name its smartphone model after the <a href="/wiki/OnePlus_3" title="OnePlus 3">3</a> and <a href="/wiki/OnePlus_3T" title="OnePlus 3T">3T</a> the <a href="/wiki/OnePlus_5" title="OnePlus 5">5</a>, avoiding the number 4.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Research">Research</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=17" title="Edit section: Research"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Baskerville_effect" title="Baskerville effect">Baskerville effect</a></div> <p>A 2001 article by authors Phillips et al published in the <i><a href="/wiki/British_Medical_Journal" class="mw-redirect" title="British Medical Journal">British Medical Journal</a></i> reported a study that looked at mortality statistics in the United States over a 25-year period. The authors reported findings that on the fourth day of the month, Asian people were thirteen percent more likely to die of heart failure. In California, Asians were twenty-seven percent more likely to die of a heart attack on that day. The hypothesis purportedly tested in the study was that psychological stress caused by belief in this superstition could indeed trigger deadly heart attacks and other fatal incidents.<sup id="cite_ref-TetraJournal_18-0" class="reference"><a href="#cite_note-TetraJournal-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </p><p>Subsequent efforts by other researchers have failed to replicate the findings reported by Phillips and collaborators.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> One such effort was by researchers who replicated the 2001 study's methods in a Hong Kong Chinese population which did not show evidence consistent with increased cardiac mortality on the 4th, 14th, or 24th days of the month.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> Another such effort was by <a rel="nofollow" class="external text" href="https://www.pomona.edu/directory/people/gary-n-smith">Gary Smith</a>, an economist with expertise in debunking improper use of data in statistical analyses. A 2002 article by Smith was published in the same scientific journal as the 2001 article, and details Smith's replication of Phillips's study using the same dataset but more scientifically appropriate statistical comparisons. Smith's reanalysis of the data did not find evidence to support the conclusions drawn in the 2001 study. Furthermore, Smith's review of other scientific publications by Phillips identified inconsistencies in the 2001 study's methodology compared to the author's other published work, where the 2001 study was reported to include only a subset of cardiac deaths compared to work by Phillips on similar populations with similar definitions of cardiac mortality groups.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="In_popular_culture">In popular culture</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=18" title="Edit section: In popular culture"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Guido_Mista" class="mw-redirect" title="Guido Mista">Guido Mista</a>, a supporting character and core ally from the <i><a href="/wiki/Golden_Wind_(manga)" title="Golden Wind (manga)">Golden Wind</a></i> arc of the anime and manga series <i><a href="/wiki/JoJo%27s_Bizarre_Adventure" title="JoJo's Bizarre Adventure">JoJo's Bizarre Adventure</a></i>, suffers from tetraphobia. He demonstrates his fear and aversion of the number four itself through - among other things - complaining or becoming agitated when having to choose something from a group of four, and panicking when he finds himself with exactly four spare bullets for his revolver. Mista commands a <a href="/wiki/JoJo%27s_Bizarre_Adventure#Plot" title="JoJo's Bizarre Adventure">Stand</a> called Sex Pistols, six spirit-like entities, referring to each one as "#1" through "#7", omitting "#4". #5, who has a nervous disposition unlike the others, is frequently picked on by #3, due to it being the 4th member sequentially. Ironically, #5's more timid nature and its hesitance to enter dangerous situations means that it has regularly survived when its comrades were destroyed by enemy stands, thus preventing Mista from dying multiple times throughout the story.</li> <li>In the Japanese anime and manga series <i><a href="/wiki/The_Promised_Neverland" title="The Promised Neverland">The Promised Neverland</a></i>, one character uses the number 4 to reference the death of a certain character.</li> <li>In <i><a href="/wiki/Blade_Runner" title="Blade Runner">Blade Runner</a></i> the noodle shop chef tells <a href="/wiki/Rick_Deckard" title="Rick Deckard">Rick Deckard</a>, who is asking for four servings of sushi, that two will be enough for him.</li> <li>In <i><a href="/wiki/Artemis_Fowl:_The_Atlantis_Complex" class="mw-redirect" title="Artemis Fowl: The Atlantis Complex">Artemis Fowl: The Atlantis Complex</a></i> the titular character, <i><a href="/wiki/Artemis_Fowl_II" title="Artemis Fowl II">Artemis Fowl II</a></i>, suffers from tetraphobia as a symptom of <i>Atlantis Complex</i>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=19" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Curse_of_39" title="Curse of 39">Curse of 39</a></li> <li><a href="/wiki/Faux_pas_derived_from_Chinese_pronunciation" title="Faux pas derived from Chinese pronunciation">Faux pas derived from Chinese pronunciation</a></li> <li><a href="/wiki/Japanese_wordplay" title="Japanese wordplay">Japanese wordplay</a></li> <li><a href="/wiki/List_of_phobias" title="List of phobias">List of phobias</a>, including <a href="/wiki/Numerophobia" title="Numerophobia">Numerophobia</a></li> <li><a href="/wiki/Numbers_in_Chinese_culture" class="mw-redirect" title="Numbers in Chinese culture">Numbers in Chinese culture</a></li> <li><a href="/wiki/Triskaidekaphobia" title="Triskaidekaphobia">Triskaidekaphobia</a>, fear or avoidance of the number <a href="/wiki/13_(number)" title="13 (number)">13</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=20" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFHavil2007" class="citation book cs1">Havil, Julian (2007). <span class="id-lock-registration" title="Free registration required"><a rel="nofollow" class="external text" href="https://archive.org/details/nonplussedmathem00havi/page/153"><i>Nonplussed: Mathematical Proof of Implausible Ideas (Hardcover)</i></a></span>. 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S (22 December 2001). <a rel="nofollow" class="external text" href="https://www.bmj.com/content/323/7327/1443">"The Hound of the Baskervilles effect: natural experiment on the influence of psychological stress on timing of death"</a>. <i>BMJ</i>. <b>323</b> (7327): 1443–1446. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1136%2Fbmj.323.7327.1443">10.1136/bmj.323.7327.1443</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0959-8138">0959-8138</a>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a> <span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC61045">61045</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/11751347">11751347</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=BMJ&rft.atitle=The+Hound+of+the+Baskervilles+effect%3A+natural+experiment+on+the+influence+of+psychological+stress+on+timing+of+death&rft.volume=323&rft.issue=7327&rft.pages=1443-1446&rft.date=2001-12-22&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC61045%23id-name%3DPMC&rft.issn=0959-8138&rft_id=info%3Apmid%2F11751347&rft_id=info%3Adoi%2F10.1136%2Fbmj.323.7327.1443&rft.aulast=Phillips&rft.aufirst=D.+P&rft.au=Liu%2C+G.+C&rft.au=Kwok%2C+K.&rft.au=Jarvinen%2C+J.+R&rft.au=Zhang%2C+W.&rft.au=Abramson%2C+I.+S&rft_id=https%3A%2F%2Fwww.bmj.com%2Fcontent%2F323%2F7327%2F1443&rfr_id=info%3Asid%2Fen.wikipedia.org%3ATetraphobia" class="Z3988"></span></span> </li> <li id="cite_note-19"><span class="mw-cite-backlink"><b><a href="#cite_ref-19">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.mcgill.ca/oss/article/general-science/number-four-kills-again-or-does-it">"The Number Four Kills Again… Or Does It?"</a>. <i>Office for Science and Society</i><span class="reference-accessdate">. Retrieved <span class="nowrap">14 August</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Office+for+Science+and+Society&rft.atitle=The+Number+Four+Kills+Again%E2%80%A6+Or+Does+It%3F&rft_id=https%3A%2F%2Fwww.mcgill.ca%2Foss%2Farticle%2Fgeneral-science%2Fnumber-four-kills-again-or-does-it&rfr_id=info%3Asid%2Fen.wikipedia.org%3ATetraphobia" class="Z3988"></span></span> </li> <li id="cite_note-20"><span class="mw-cite-backlink"><b><a href="#cite_ref-20">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPanesarChanLiLo2003" class="citation journal cs1">Panesar, Nirmal S.; Chan, Noel C. Y.; Li, Shi N.; Lo, Joyce K. Y.; Wong, Vivien W. Y.; Yang, Isaac B.; Yip, Emily K. Y. (1 December 2003). <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/14636150/">"Is four a deadly number for the Chinese?"</a>. <i>The Medical Journal of Australia</i>. <b>179</b> (11–12): 656–658. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.5694%2Fj.1326-5377.2003.tb05741.x">10.5694/j.1326-5377.2003.tb05741.x</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/1326-5377">1326-5377</a>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/14636150">14636150</a>.</cite><span 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December 2002). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC139029">"Scared to death?"</a>. <i>BMJ (Clinical Research Ed.)</i>. <b>325</b> (7378): 1442–1443. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1136%2Fbmj.325.7378.1442">10.1136/bmj.325.7378.1442</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/1756-1833">1756-1833</a>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a> <span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC139029">139029</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/12493656">12493656</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=BMJ+%28Clinical+Research+Ed.%29&rft.atitle=Scared+to+death%3F&rft.volume=325&rft.issue=7378&rft.pages=1442-1443&rft.date=2002-12-21&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC139029%23id-name%3DPMC&rft.issn=1756-1833&rft_id=info%3Apmid%2F12493656&rft_id=info%3Adoi%2F10.1136%2Fbmj.325.7378.1442&rft.aulast=Smith&rft.aufirst=Gary&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC139029&rfr_id=info%3Asid%2Fen.wikipedia.org%3ATetraphobia" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Tetraphobia&action=edit&section=21" title="Edit section: External links"><span>edit</span></a><span 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title="Omen">Omen</a></li> <li><a href="/wiki/Talisman" title="Talisman">Talismans</a></li> <li><a href="/wiki/Myth_and_ritual" title="Myth and ritual">Myth and ritual</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Lists</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_superstitions" title="List of superstitions">List of superstitions</a></li> <li><a href="/wiki/List_of_lucky_symbols" title="List of lucky symbols">List of lucky symbols</a></li> <li><a href="/wiki/List_of_bad_luck_signs" title="List of bad luck signs">List of bad luck signs</a></li> <li><a href="/wiki/Sailors%27_superstitions" title="Sailors' superstitions">Sailors' superstitions</a></li> <li><a href="/wiki/Theatrical_superstitions" title="Theatrical superstitions">Theatrical superstitions</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Africa</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Superstition_in_Ethiopia" title="Superstition in Ethiopia">Superstition in Ethiopia</a></li> <li><a href="/wiki/Buda_(folklore)" title="Buda (folklore)">Buda</a></li> <li><a href="/wiki/Gris-gris_(talisman)" title="Gris-gris (talisman)">Gris-gris</a></li> <li><a href="/wiki/Sampy" title="Sampy">Sampy</a></li> <li><a href="/wiki/Sleeping_child" title="Sleeping child">Sleeping child</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Americas</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Ascalapha_odorata" title="Ascalapha odorata">Ascalapha odorata</a></i></li> <li><a href="/wiki/Bermuda_Triangle" title="Bermuda Triangle">Bermuda Triangle</a></li> <li><a href="/wiki/Witchcraft_in_Latin_America" title="Witchcraft in Latin America">Brujería</a></li> <li><a href="/wiki/Carranca" title="Carranca">Carranca</a></li> <li><a href="/wiki/Cooties" title="Cooties">Cooties</a></li> <li><a href="/wiki/Curse_of_Tippecanoe" title="Curse of Tippecanoe">Curse of Tippecanoe</a></li> <li><a href="/wiki/Curupira" title="Curupira">Curupira</a></li> <li><a href="/wiki/Djucu" title="Djucu">Djucu</a></li> <li><a href="/wiki/Fortune_cookie" title="Fortune cookie">Fortune cookie</a></li> <li><a href="/wiki/Groundhog_Day" title="Groundhog Day">Groundhog Day</a></li> <li><a href="/wiki/I%27noGo_tied" title="I'noGo tied">I'noGo tied</a></li> <li><a href="/wiki/Oscar_love_curse" title="Oscar love curse">Oscar love curse</a></li> <li><a href="/wiki/Susto" title="Susto">Susto</a></li> <li><a href="/wiki/Veve" title="Veve">Veve</a></li> <li><a href="/wiki/White_lighter_myth" title="White lighter myth">White lighter myth</a></li> <li><a href="/wiki/Witch_window" title="Witch window">Witch window</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Asia</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Superstition_in_India" title="Superstition in India">Superstition in India</a></li> <li><a href="/wiki/Superstition_in_Pakistan" title="Superstition in Pakistan">Superstition in Pakistan</a></li> <li><a href="/wiki/Superstition_in_the_Philippines" title="Superstition in the Philippines">Superstition in the Philippines</a></li> <li><a href="/wiki/Japanese_superstitions" title="Japanese superstitions">Japanese superstitions</a></li> <li><a href="/wiki/Superstition_in_Korea" title="Superstition in Korea">Superstition in Korea</a></li> <li><a href="/wiki/Bhoot_(ghost)" class="mw-redirect" title="Bhoot (ghost)"><i>Bhoot</i> (ghost)</a></li> <li><a href="/wiki/Chhaupadi" title="Chhaupadi">Chhaupadi</a></li> <li><a href="/wiki/Churel" title="Churel">Churel</a></li> <li><a href="/wiki/Ghosts_in_Bengali_culture" title="Ghosts in Bengali culture">Ghosts in Bengali culture</a></li> <li><a href="/wiki/Jackal%27s_horn" title="Jackal's horn">Jackal's horn</a></li> <li><a href="/wiki/Kuai_Kuai_culture" title="Kuai Kuai culture">Kuai Kuai culture</a></li> <li><a href="/wiki/Muhurta" title="Muhurta">Muhurta</a></li> <li><a href="/wiki/Navaratna" title="Navaratna">Navaratna</a></li> <li><a href="/wiki/Nazar_(amulet)" title="Nazar (amulet)">Nazar</a></li> <li><a href="/wiki/Nazar_battu" title="Nazar battu">Nazar battu</a></li> <li><a href="/wiki/Pichal_Peri" title="Pichal Peri">Pichal Peri</a></li> <li><a href="/wiki/Puppy_pregnancy_syndrome" title="Puppy pregnancy syndrome">Puppy pregnancy syndrome</a></li> <li><a href="/wiki/Akabeko" title="Akabeko">Akabeko</a></li> <li><a href="/wiki/Kanai_Anzen" class="mw-redirect" title="Kanai Anzen">Kanai Anzen</a></li> <li><a href="/wiki/Maneki-neko" title="Maneki-neko">Maneki-neko</a></li> <li><a href="/wiki/Okiagari-koboshi" title="Okiagari-koboshi">Okiagari-koboshi</a></li> <li><a href="/wiki/Ofuda" title="Ofuda">Ofuda</a></li> <li><a href="/wiki/Omamori" title="Omamori">Omamori</a></li> <li><a href="/wiki/Fan_death" title="Fan death">Fan death</a></li> <li><a href="/wiki/Feng_shui" title="Feng shui">Feng shui</a></li> <li><a href="/wiki/Hindu_astrology" title="Hindu astrology">Hindu astrology</a></li> <li><a href="/wiki/Agimat" title="Agimat">Agimat</a></li> <li><a href="/wiki/Albularyo" title="Albularyo">Albularyo</a></li> <li><a href="/wiki/Witchcraft_in_the_Philippines" title="Witchcraft in the Philippines">Barang</a></li> <li><a href="/wiki/Kulam" class="mw-redirect" title="Kulam">Kulam</a></li> <li><a href="/wiki/Lihi" title="Lihi">Lihi</a></li> <li><a href="/wiki/Pagtatawas" title="Pagtatawas">Pagtatawas</a></li> <li><a href="/wiki/Pasma" title="Pasma">Pasma</a></li> <li><a href="/wiki/Usog" title="Usog">Usog</a></li> <li><a href="/wiki/Kuman_Thong" class="mw-redirect" title="Kuman Thong">Kuman Thong</a></li> <li><a href="/wiki/Palad_khik" title="Palad khik">Palad khik</a></li> <li><a href="/wiki/Takrut" title="Takrut">Takrut</a></li> <li><a href="/wiki/Nang_Kwak" title="Nang Kwak">Nang Kwak</a></li> <li><a href="/wiki/Vastu_shastra" title="Vastu shastra">Vastu shastra</a></li> <li><a href="/wiki/White_elephant_(animal)" title="White elephant (animal)">White elephant</a></li> <li><a href="/wiki/Jin_Chan" title="Jin Chan">Jin Chan</a></li> <li><a href="/wiki/Chinese_numerology" title="Chinese numerology">Numbers in Chinese culture</a></li> <li><a href="/wiki/Yantra_cloth" title="Yantra cloth">Yantra cloth</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Europe</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/August_curse" title="August curse">August curse</a></li> <li><a href="/wiki/Barbary_macaques_in_Gibraltar" title="Barbary macaques in Gibraltar">Barbary macaques in Gibraltar</a></li> <li><a href="/wiki/Bayern-luck" title="Bayern-luck">Bayern-luck</a></li> <li><a href="/wiki/Blarney_Stone" title="Blarney Stone">Blarney Stone</a></li> <li><a href="/wiki/Cimaruta" title="Cimaruta">Cimaruta</a></li> <li><a href="/wiki/Cornicello" title="Cornicello">Cornicello</a></li> <li><a href="/wiki/The_Goodman%27s_Croft" title="The Goodman's Croft">The Goodman's Croft</a></li> <li><i><a href="/wiki/Himmelsbrief" title="Himmelsbrief">Himmelsbrief</a></i></li> <li><a href="/wiki/Icelandic_magical_staves" title="Icelandic magical staves">Icelandic magical staves</a></li> <li><i><a href="/wiki/In_bocca_al_lupo" title="In bocca al lupo">In bocca al lupo</a></i></li> <li><a href="/wiki/Kitchen_witch" title="Kitchen witch">Kitchen witch</a></li> <li><a href="/wiki/Klabautermann" title="Klabautermann">Klabautermann</a></li> <li><a href="/wiki/Mooncalf" title="Mooncalf">Mooncalf</a></li> <li><a href="/wiki/Need-fire" title="Need-fire">Need-fire</a></li> <li><a href="/wiki/Scottish_painted_pebbles" title="Scottish painted pebbles">Painted pebbles</a></li> <li><a href="/wiki/Powder_of_sympathy" title="Powder of sympathy">Powder of sympathy</a></li> <li><a href="/wiki/Rabbit_rabbit_rabbit" title="Rabbit rabbit rabbit">Rabbit rabbit rabbit</a></li> <li><a href="/wiki/Ravens_of_the_Tower_of_London" title="Ravens of the Tower of London">Ravens of the Tower of London</a></li> <li><a href="/wiki/Russian_traditions_and_superstitions" class="mw-redirect" title="Russian traditions and superstitions">Russian traditions and superstitions</a></li> <li><a href="/wiki/Superstition_in_Britain" class="mw-redirect" title="Superstition in Britain">Superstition in Britain</a></li> <li><a href="/wiki/Superstition_in_Serbia" title="Superstition in Serbia">Superstition in Serbia</a></li> <li><a href="/wiki/Spilling_water_for_luck" title="Spilling water for luck">Spilling water for luck</a></li> <li><i><a href="/wiki/The_Scottish_Play" title="The Scottish Play">The Scottish Play</a></i></li> <li><a href="/wiki/Troll_cross" title="Troll cross">Troll cross</a></li> <li><a href="/wiki/Tycho_Brahe_days" title="Tycho Brahe days">Tycho Brahe days</a></li> <li><a href="/wiki/Witch_post" title="Witch post">Witch post</a></li> <li><i><a href="/wiki/Wolfssegen" title="Wolfssegen">Wolfssegen</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">General</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/1" title="1">1</a> (<a href="/wiki/Ace_of_spades" title="Ace of spades">Ace of spades</a>)</li> <li><a href="/wiki/3" title="3">3</a> (<a href="/wiki/Three_on_a_match" title="Three on a match">Three on a match</a>)</li> <li><a href="/wiki/4" title="4">4</a> (<a href="/wiki/Four-leaf_clover" title="Four-leaf clover">Four-leaf clover</a>, <a class="mw-selflink selflink">tetraphobia</a>)</li> <li><a href="/wiki/7" title="7">7</a> (<a href="/wiki/Seventh_son_of_a_seventh_son" title="Seventh son of a seventh son">Seventh son of a seventh son</a>)</li> <li><a href="/wiki/11:11_(numerology)" title="11:11 (numerology)">11:11</a></li> <li><a href="/wiki/13_(number)#Luck" title="13 (number)">13</a> (<a href="/wiki/Friday_the_13th" title="Friday the 13th">Friday the 13th</a>, <a href="/wiki/The_Thirteen_Club" title="The Thirteen Club">The Thirteen Club</a>, <a href="/wiki/Thirteenth_floor" class="mw-redirect" title="Thirteenth floor">thirteenth floor</a>, <a href="/wiki/Triskaidekaphobia" title="Triskaidekaphobia">triskaidekaphobia</a>)</li> <li><a href="/wiki/17_(number)#In_other_fields" title="17 (number)">17</a> (<a href="/wiki/Heptadecaphobia" title="Heptadecaphobia">Heptadecaphobia</a>)</li> <li><a href="/wiki/27_(number)" title="27 (number)">27</a> (<a href="/wiki/27_Club" title="27 Club">27 Club</a>)</li> <li><a href="/wiki/39_(number)" title="39 (number)">39</a> (<a href="/wiki/Curse_of_39" title="Curse of 39">Curse of 39</a>)</li> <li><a href="/wiki/666_(number)" title="666 (number)">666</a> (<a href="/wiki/Number_of_the_beast" title="Number of the beast">Number of the Beast</a>)</li> <li><a href="/wiki/Auspicious_wedding_dates" title="Auspicious wedding dates">Auspicious wedding dates</a></li> <li><a href="/wiki/Baseball_superstition" title="Baseball superstition">Baseball superstition</a></li> <li><a href="/wiki/Beginner%27s_luck" title="Beginner's luck">Beginner's luck</a></li> <li><a href="/wiki/Black_cat" title="Black cat">Black cat</a></li> <li><a href="/wiki/Bread_and_butter_(superstition)" title="Bread and butter (superstition)">Bread and butter</a></li> <li><a href="/wiki/Break_a_leg" title="Break a leg">Break a leg</a></li> <li><a href="/wiki/Bullroarer" title="Bullroarer">Bullroarer</a></li> <li><a href="/wiki/Chain_letter" title="Chain letter">Chain letter</a></li> <li><a href="/wiki/Cramp-ring" title="Cramp-ring">Cramp-ring</a></li> <li><a href="/wiki/Curse" title="Curse">Curse</a></li> <li><a href="/wiki/Davy_Jones%27_Locker" class="mw-redirect" title="Davy Jones' Locker">Davy Jones' Locker</a></li> <li><a href="/wiki/Dead_man%27s_hand" title="Dead man's hand">Dead man's hand</a></li> <li><a href="/wiki/End-of-the-day_betting_effect" title="End-of-the-day betting effect">End-of-the-day betting effect</a></li> <li><a href="/wiki/Fear_of_frogs" title="Fear of frogs">Fear of frogs</a></li> <li><a href="/wiki/Fear_of_ghosts" title="Fear of ghosts">Fear of ghosts</a></li> <li><a href="/wiki/Fertility_rite" title="Fertility rite">Fertility rite</a></li> <li><a href="/wiki/First-foot" title="First-foot">First-foot</a></li> <li><i><a href="/wiki/Flying_Dutchman" title="Flying Dutchman">Flying Dutchman</a></i></li> <li><a href="/wiki/Four_eleven_forty-four" title="Four eleven forty-four">Four eleven forty-four</a></li> <li><a href="/wiki/Gambler%27s_conceit" title="Gambler's conceit">Gambler's conceit</a></li> <li><a href="/wiki/List_of_lucky_symbols" title="List of lucky symbols">Good luck charm</a></li> <li><a href="/wiki/Human_sacrifice" title="Human sacrifice">Human sacrifice</a></li> <li><a href="/wiki/Jinx" title="Jinx">Jinx</a></li> <li><a href="/wiki/Curse" title="Curse">Hex</a></li> <li><a href="/wiki/Knocking_on_wood" title="Knocking on wood">Knocking on wood</a></li> <li><a href="/wiki/Law_of_contagion" title="Law of contagion">Law of contagion</a></li> <li><a href="/wiki/Literomancy" title="Literomancy">Literomancy</a></li> <li><a href="/wiki/Lock_of_hair" title="Lock of hair">Lock of hair</a></li> <li><a href="/wiki/Maternal_impression" title="Maternal impression">Maternal impression</a></li> <li><a href="/wiki/Miasma_theory" title="Miasma theory">Miasma theory</a></li> <li><a href="/wiki/Nelson_(cricket)" title="Nelson (cricket)">Nelson</a></li> <li><a href="/wiki/Numerophobia" title="Numerophobia">Numerophobia</a></li> <li><a href="/wiki/Numismatic_charm" title="Numismatic charm">Numismatic charm</a></li> <li><a href="/wiki/Penny" title="Penny">Penny</a></li> <li><a href="/wiki/Rabbit%27s_foot" title="Rabbit's foot">Rabbit's foot</a></li> <li><a href="/wiki/Rainmaking_(ritual)" title="Rainmaking (ritual)">Rainmaking</a></li> <li><a href="/wiki/Ship_sponsor" title="Ship sponsor">Ship sponsor</a></li> <li><a href="/wiki/Shoes_on_a_table" title="Shoes on a table">Shoes on a table</a></li> <li><a href="/wiki/Sign_of_the_horns" title="Sign of the horns">Sign of the horns</a></li> <li><a href="/wiki/Something_old" title="Something old">Something old</a></li> <li><a href="/wiki/Spilling_salt" title="Spilling salt">Spilling salt</a></li> <li><a href="/wiki/Statue_rubbing" title="Statue rubbing">Statue rubbing</a></li> <li><a href="/wiki/Threshold_(door)" class="mw-redirect" title="Threshold (door)">Threshold</a></li> <li><a href="/wiki/Toi_toi_toi" title="Toi toi toi">Toi toi toi</a></li> <li><a href="/wiki/Wishing_well" title="Wishing well">Wishing well</a></li> <li><a href="/wiki/Witch_ball" title="Witch ball">Witch ball</a></li> <li><a href="/wiki/Witching_hour" title="Witching hour">Witching hour</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apophenia" title="Apophenia">Apophenia</a></li> <li><a href="/wiki/Apotropaic_magic" title="Apotropaic magic">Apotropaic magic</a></li> <li><a href="/wiki/Astrology_and_science" title="Astrology and science">Astrology and science</a></li> <li><a href="/wiki/Coincidence" title="Coincidence">Coincidence</a></li> <li><a href="/wiki/Debunker" title="Debunker">Debunker</a></li> <li><a href="/wiki/Divination" title="Divination">Divination</a></li> <li><a href="/wiki/Folk_religion" title="Folk religion">Folk religion</a></li> <li><a href="/wiki/Fortune-telling" title="Fortune-telling">Fortune-telling</a></li> <li><a href="/wiki/Magic_and_religion" title="Magic and religion">Magic and religion</a></li> <li><a href="/wiki/Magical_thinking" title="Magical thinking">Magical thinking</a></li> <li><a href="/wiki/Numerology" title="Numerology">Numerology</a></li> <li><a href="/wiki/Obsessive%E2%80%93compulsive_disorder" title="Obsessive–compulsive disorder">Obsessive–compulsive disorder</a></li> <li><a href="/wiki/Perceptions_of_religious_imagery_in_natural_phenomena" title="Perceptions of religious imagery in natural phenomena">Perceptions of religious imagery in natural phenomena</a></li> <li><a href="/wiki/Post_hoc_ergo_propter_hoc" title="Post hoc ergo propter hoc">Post hoc ergo propter hoc</a></li> <li><a href="/wiki/Questionable_cause" title="Questionable cause">Questionable cause</a></li> <li><a href="/wiki/Superstition_in_Judaism" title="Superstition in Judaism">Superstition in Judaism</a></li> <li><a href="/wiki/Superstitions_in_Muslim_societies" class="mw-redirect" title="Superstitions in Muslim societies">Superstitions in Muslim societies</a></li> <li><a href="/wiki/Traditional_medicine" title="Traditional medicine">Traditional medicine</a></li> <li><a href="/wiki/Urban_legend" title="Urban legend">Urban legend</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Tetraphobia&oldid=1252389550">https://en.wikipedia.org/w/index.php?title=Tetraphobia&oldid=1252389550</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: 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