Meaning

noun a healthy capacity for vigorous activity

noun an imaginative lively style (especially style of writing)

originPossibly from Latin vim, accusative singular of vīs (“force, power, strength; (New Latin) energy, force”) (ultimately from Proto-Indo-European *weyh₁- (“to chase, pursue”); compare English vis); but perhaps a modern expressive formation.

Etymology from Wiktionary, CC BY-SA 3.0