coeperant
coeperant is a Latin form of coepio, meaning “begin”. It is the 3rd person plural pluperfect active indicative.
Found 28 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 1.26.1: Ita ancipiti proelio diu atque acriter pugnatum est. Diutius cum sustinere nostrorum impetus non possent, alteri se, ut coeperant, in montem receperunt, alteri ad impedimenta et carros suos se contulerunt.
Curtius Rufus, Historiarum Alexandri Magni 6.1.2: Coeperant fugere victores et, donec avidius sequentes in planum deduxere, inulti cadebant: sed ut primum locus, in quo stare possent, fuit, aequis viribus dimicatum est.
All forms of coepio (conjugation table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.