1640s, from Latin vivax (genitive vivacis) "lively, vigorous" (from PIE root *gwei- "to live") + -ous. Related: Vivaciously.
a charming and vivacious hostess
a vivacious folk dance
vituperative
Vitus
viva
viva voce
vivace
vivacious
vivacity
vivarium
vive
Vivian
vivid
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