Where does “trimester” come from?

Trimester comes from French trimestre, from Latin trimestris, meaning a three-month period, from Latin mensis (month) and the root for three in Proto-Indo-European tréyes and meh₁-.

trimester (English): A period of three months or about three months;...

Definitions

  1. A period of three months or about three months;...

Ancestry of “trimester”, step by step

StepLanguageWordMeaning
1Frenchtrimestrequarter; term; trimester
2Latintrimestristhree months
3Latinmēnsismonth
4Proto-Italicmēnsis—
5Proto-Italicmēnsmonth
6Proto-Indo-Europeanmḗh₁n̥smoon; month
7Proto-Indo-Europeanmeh₁-to measure

Words derived from “trimester”

Every word from Proto-Indo-European meh₁- →
trimester — Etymology, Origin & Word History | Etymology Explorer