fuissent

fuissent is a Latin form of sum, meaning “be, exist; (as auxiliary) is, are, was”. It is the 3rd person plural pluperfect active subjunctive.

Found 253 times in the Latin texts on Socratos.

Where it is used

Caesar, De Bello Gallico 2.14.4: Qui eius consilii principes fuissent, quod intellegerent quantam calamitatem civitati intulissent, in Britanniam profugisse.

Plautus, Bacchides 5.2.1207: Hí senes nisi fuíssent nihili iam índe ab adulescéntia,

All forms of sum (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.