English edit

English numbers (edit)
 ←  20  ←  29 30 31  →  40  → 
    Cardinal: thirty
    Ordinal: thirtieth
    Adverbial: thirty times
    Multiplier: thirtyfold

Alternative forms edit

Etymology edit

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.[1][2] Cognate with Scots therty, tretty (thirty), West Frisian tritich (thirty), Dutch dertig (thirty), German dreißig (thirty).

Pronunciation edit

Numeral edit


  1. The cardinal number occurring after twenty-nine and before thirty-one, represented in Arabic numerals as 30.

Synonyms edit

Derived terms edit

Translations edit

See also edit

Noun edit

thirty (plural thirties)

  1. (slang) A rack of thirty beers.

References edit

  1. 1.0 1.1 thirty”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.
  2. 2.0 2.1 thirty”, in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present.
  3. ^ Macmillan (US) (compare Macmillan (UK)
  4. ^ the Oxford Advanced Learner's Dictionary