sadist
From Longman Dictionary of Contemporary EnglishRelated topics: Psychology, psychiatrysadistsa‧dist /ˈseɪdɪst/ noun [countable] MPCRUELsomeone who enjoys hurting other people or making them suffer → masochistExamples from the Corpussadist• The man was clearly a sadist.• Karl's a sadist, he enjoys inflicting pain.• Andrea's father was an absolute sadist. It's not surprising she hates him.• He says it's some kind of sadist that carries out this kind of attack.• The man was a raving sadist, she thought, and then realised it was a requirement of his job.• The sodomite captain proves brave, the sadist a bungler.• He brings out the sadist in me.