poterant
poterant is a Latin form of possum, meaning “be able, can”. It is the 3rd person plural imperfect active indicative.
Found 325 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 1.9.1: Relinquebatur una per Sequanos via, qua Sequanis invitis propter angustias ire non poterant.
Seneca the Younger, Epistulae 15.95.14: … opus quidem adhuc erat remediis diligentibus. Nondum in tantum nequitia surrexerat nec tam late se sparserat. Poterant vi tus simplicibus obstare remedia simplicia; nunc necesse est tanto operosiora esse munimenta, quanto veheme …
All forms of possum (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.