Vigorous

Part of speech: adjective (a.)

1. Possessing vigor; full of physical or mental strength or active force; strong; lusty; robust; as, a vigorous youth; a vigorous plant. Famed for his valor, young, At sea successful, vigorous and strong. Waller.

2. Exhibiting strength, either of body or mind; powerful; strong; forcible; energetic; as, vigorous exertions; a vigorous prosecution of a war. The beginnings of confederacies have been always vigorous and successful. Davenant. -- Vig"or*ous*ly, adv. -- Vig"or*ous*ness, n.