sadisticEnglishOxford New American Dictionarysadistic /səˈdistik, səˈdɪstɪk / ▸ adjective deriving pleasure from inflicting pain, suffering, or humiliation on others: she took a sadistic pleasure in tormenting him a sadistic killer. – DERIVATIVES sadistically /səˈdistək(ə)lē, səˈdɪstək(ə)li / adverb