Vigorous
Vigorous , adjective
[Compare Old French vigoros, French vigoureux, Late Latin vigorosus.]
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.
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.