Vigorous
来自Big Physics
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Middle English: via Old French from medieval Latin vigorosus, from Latin vigor (see vigour).
wiktionary
From Anglo-Norman vigrus, from Old French vigoros (French vigoureux), from Medieval Latin vigorosus, from Latin vigor. Doublet of vigoroso.
etymonline
vigorous (adj.)
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.
