Crossword Dictionary

VIGOROUS

vigorous - a 
characterized by forceful and energetic action or activity; "a vigorous hiker"; "gave her skirt a vigorous shake"; "a vigorous campaign"; "a vigorous foreign policy"; "vigorous opposition to the war" 
strong and active physically or mentally; "a vigorous old man who spent half of his day on horseback"- W.H.Hudson 

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Synonyms

dynamic, energetic, flush, gingery, lusty, peppy, red-blooded, robust, vital

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Examples

They assist in the extremely rapid and vigorous ventilation of the lungs, the latter being capable of but very limited expansion and contraction in birds.

While back-country skiing was also popular, the ever constant danger of killing snow slides made marked trails a safer method of enjoying this vigorous sport.

The trees have ample room to expand on the water side, and each sends forth its most vigorous branch in that direction.

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Etymology

c. 1300 (early 13c. as a surname), from Anglo-French vigrus, Old French vigoros "strong, robust, powerful" (12c., Modern French vigoreux), from Medieval Latin vigorosus, from Latin vigere "be lively, flourish, thrive" (see vigor). Related: Vigorously.

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