thirty

Reading level: medium

Estimated CEFR level: A2 — Elementary

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun the cardinal number that is the product of ten and three
  2. adjective being ten more than twenty

Etymology

From Middle English thirty, metathetic alternant of Middle English thriti, þrittiȝ, from Old English þrītiġ (“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”).

In classic literature

Synonyms

30, XXX

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