Meanings
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Simplified etymology
Vicious derives from Latin vitium, “vice,” which is also the source of vice in its moral sense. In Middle English vicious meant “showing vice.” In the early 18th century it was extended to mean “savage” in descriptions of bad-tempered horses, and in the 19th century it acquired the meaning “spiteful.”
Etymology
PIE word *dwóh₁ From Middle English vicious, from Anglo-Norman vicious, (modern French vicieux), from Latin vitiōsus, from vitium (“fault, vice”). Equivalent to vice + -ous.
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