English trimester

← French trimestre (derived)

← Proto-Indo-European *meh₁- (root)

← Latin trimestris (derived)

← Latin trēs (mention)

← Latin mensis (mention)

→ English quarter (link)

→ English tri- (link)

→ English term (link)

→ English trimestral (suffix)

→ English midtrimester (prefix)

→ Irish tréimhse (mention)