Powerful /(?)/

Pow·er·ful

Powerful

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.
  2. Large; capacious; -- said of veins of ore. (Mining)