virulent

having or showing a desire to cause someone pain or suffering for the sheer enjoyment of it the virulent look on her face warned me that she was about to say something unkind Synonyms bad [slang], bitchy, catty, cruel, despiteful, malevolent, malicious, malign, malignant, mean, nasty, spiteful, vicious, hatefulRelated Words devious, scoundrelly, scurvy, snakelike; acrimonious, bitter, envious, jaundiced, jealous, rancorous, resentful, vindictive, vitriolic; contemptuous, deprecating, derogatory, disdainful, disparaging, mean-spirited, obnoxious, opprobrious, scornful, snide, snotty, unkind, unkindly, unloving; baleful, baneful, evil; harsh, hostile, inimical; acrid, caustic, poisonous, scathing, venomousNear Antonyms compassionate, good, good-hearted, kind, kindhearted, kindly, sympathetic, warm, warmhearted; affable, agreeable, amiable, cordial, friendly, genial, gracious, nice, pleasant; affectionate, amorous, sweet, tender, tenderhearted; humane; altruistic, high-minded, humanitarian, magnanimous, noble, philanthropic (also philanthropical)Antonyms benevolent, benign, benignant, loving, unmalicious