fuissem
fuissem is a Latin form of sum, meaning “be, exist; (as auxiliary) is, are, was”. It is the 1st person singular pluperfect active subjunctive.
Found 56 times in the Latin texts on Socratos.
Where it is used
Cicero, In C. Verrem 2.1.16: … , pudorem vero ac religionem quod, cum venissem senator ad socios populi Romani, qui in ea provincia quaestor fuissem, ad hospites meos ac necessarios causae communis defensor deverti potius quam ad eos qui a me auxilium petivi …
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.