adjective
hurtful, injurious
Synonyms: antagonistic, antipathetic, bad, baleful, baneful, deleterious, despiteful, destructive, detrimental, evil, harmful, hateful, hostile, inimical, malefic, maleficent, malevolent, malignant, noxious, pernicious, rancorous, sinister, spiteful, vicious, wicked
Antonyms: aiding, benign, helpful, nice
verb
slander, defame
Synonyms: abuse, accuse, asperse, backbite, bad-mouth, befoul, besmirch, bespatter, blacken, calumniate, cast aspersion, curse, decry, defile, denigrate, depreciate, derogate, detract, dirty, disparage, harm, injure, insult, misrepresent, mudsling, opprobriate, pollute, rap, revile, roast, run down, scandalize, slur, smear, soil, spatter, speak ill of, stain, sully, taint, take a swipe at, tarnish, tear down, traduce, vilify, villainize, vituperate
Antonyms: praise, uphold