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From Old French malicios, from Latin malitiosus, from malitia (âmaliceâ), from malus (âbadâ). malicious (comparative more malicious, superlative most malicious) Of, pertaining to, or as a result of malice or spite. spiteful and deliberately harmful He was sent off for a malicious tackle on Jones.
See Malignant. Extreme malevolence; bitter enmity; malice; as malignancy of heart. 1. Unfavorableness; unpropitiousness; as the malignancy of the aspect of planets. The malignancy of my fate might distemper yours. 2. Virulence; tendency to mortification or to a fatal issue; as the malignancy of an ulcer or of a fever.