operae

operae is a Latin form of opera, meaning “work, effort; service”. It is the genitive singular feminine noun.

Found 189 times in the Latin texts on Socratos.

Where it is used

Caesar, De Bello Gallico 5.11.5: Ipse, etsi res erat multae operae ac laboris, tamen commodissimum esse statuit omnes naves subduci et cum castris una munitione coniungi.

Sallust, Catilinae Coniuratio 12: … endere, aliena cupere, pudorem, pudicitiam, divina atque humana promiscua, nihil pensi neque moderati habere. Operae pretium est, cum domos atque villas cognoveris in urbium modum exaedificatas, visere templa deorum, quae nost …

Plautus, Casina 5.2.879: operám date, dum mea fácta itero: est operaé pretium auribus áccipere,

All forms of opera (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.