quassō āvī, ātus, āre, freq. quatio, to shake violently, toss, brandish, wave: pinum, V.: hastam, V.: ramum super utraque Tempora, V.: laetum siliquā quassante legumen, nodding pod, V.

—To shatter, shiver, dash to pieces, batter: turris diu quassata prociderat, L.: Quassata ventis classis, V.: quassata domus, O.

—Fig., to shake, shatter, impair, weaken: quassatā re p.