posuisset
posuisset is a Latin form of pono, meaning “put, place, set; lay aside”. It is the 3rd person singular pluperfect active subjunctive.
Found 41 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 1.45.2: Bello superatos esse Arvernos et Rutenos a Q. Fabio Maximo, quibus populus Romanus ignovisset neque in provinciam redegisset neque stipendium posuisset.
All forms of pono (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.