Powerful

Part of speech: adjective (a.)

1. Full of power; capable of producing great effects of any kind; potent; mighty; efficacious; intense; as, a powerful man or beast; a powerful engine; a powerful argument; a powerful light; a powerful vessel. The powerful grace that lies In herbs, plants, stones, and their true qualities. Shak.

2. Large; capacious; -- said of veins of ore.

Synonyms: Mighty; strong; potent; forcible; efficacious; energetic; intense. Pow"er*ful*ly, adv. Pow"er*ful*ness, n.