Added 9 October 2026
thirty
/ˈθɜːti/ numeral
In Latin: trīginta Wiktionary
numeral Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about thirty at Wordnik → Where our words come from →
- The cardinal number occurring after twenty-nine and before thirty-one, represented in Arabic numerals as 30.
noun
- A rack of thirty beers.
- A commercial lasting 30 seconds.
Origin
From Middle English thirty, metathetic alternant of thritty, from Old English þrītiġ, þrittiġ (“thirty”), from Proto-Germanic *þrīz tigiwiz (“thirty”, literally “three tens”), equivalent to three + -ty. Cognate with Scots therty, tretty (“thirty”), West Frisian tritich (“thirty”), Dutch dertig (“thirty”), German dreißig (“thirty”).
From Wiktionary, via Kaikki.org (CC BY-SA)