powerful, a.1aCumhachtach, cumasach. A powerful enemy, namhaid chumasach. bLáidir, éifeachtach. Powerful remedy, leigheas éifeachtach. 2P: A powerful lot of people, neart m, an-lear, daoine. ►powerfully, adv.Go cumhachtach, etc. Powerfully built man, fear cumasach láidir.