opinionis
opinionis is a Latin form of opinio, meaning “opinion, belief; reputation”. It is the genitive singular feminine noun.
Found 52 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 5.54.5: Idque adeo haud scio mirandumne sit, cum compluribus aliis de causis, tum maxime quod ei, qui virtute belli omnibus gentibus praeferebantur, tantum se eius opinionis deperdidisse ut a populo Romano imperia perferrent gravissime dolebant.
All forms of opinio (declension 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.