trentaine

From trente +‎ -aine.

• IPA^(key): /tʁɑ̃.tɛn/

trentaine f (plural trentaines)

1. about thirty
2. one's thirties (period of life between ages 30 and 39)

   un homme dans la trentaine

   a man in his thirties

• centaine, cinquantaine, dizaine, douzaine, huitaine, quarantaine, quinzaine, soixantaine, vingtaine

• “trentaine”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012

• entérinât, entraient, étrennait, rentaient