nīsus -, abl. ū, m CNI-, a pressing upon, pressure, push, striving, exertion, labor, effort: pedetentim et sedato nisu, tread: Insolitos docuere nisūs, H.: Stat nisu inmotus eodem, in the same posture, V.: uti nisus per saxa facilius foret, S.: quae dubia nisu videbantur, S.: rapidus, flight, V.