dedissent
dedissent is a Latin form of do, meaning “give; put; grant”. It is the 3rd person plural pluperfect active subjunctive.
Found 60 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 3.8.2: Ab his fit initium retinendi Silii atque Velanii, quod per eos suos se obsides, quos Crasso dedissent, recuperaturos existimabant.
All forms of do (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.