oportebat
oportebat is a Latin form of oportet, meaning “it is necessary, one ought”. It is the 3rd person singular imperfect active indicative.
Found 69 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 1.4.1: Ea res est Helvetiis per indicium enuntiata. Moribus suis Orgetoricem ex vinculis causam dicere coegerunt; damnatum poenam sequi oportebat, ut igni cremaretur.
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.