operis

operis is a Latin form of opus, meaning “work, task; (opus est) there is need of”. It is the genitive singular neuter noun.

Found 378 times in the Latin texts on Socratos.

Where it is used

Caesar, De Bello Gallico 1.8.4: … Rhodani, qua minima altitudo fluminis erat, non numquam interdiu, saepius noctu si perrumpere possent conati, operis munitione et militum concursu et telis repulsi, hoc conatu destiterunt.

Plautus, Menaechmi 2.3.434_435: Habeo praedam: tantum incepi óperis. ei quantum potes,

Boethius, De consolatione philosophiae 1.P5.44: Operis tanti pars non ullis

All forms of opus (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.