Pow"er*ful (?), a.
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.
Large; capacious; -- said of veins of ore.
Syn. -- Mighty; strong; potent; forcible; efficacious; energetic; intense.
-- Pow"er*ful*ly, adv. -- Pow"er*ful*ness, n.
© Webster 1913.