cecidisset
cecidisset is a Latin form of cado, meaning “fall; die”. It is the 3rd person singular pluperfect active subjunctive.
Found 32 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 4.12.6: cum circumventus multis vulneribus acceptis cecidisset atque id frater, qui iam proelio excesserat, procul animadvertisset, incitato equo se hostibus obtulit atque interfectus est.
All forms of cado (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.