Malign
adjective
having or exerting a malignant influence
“malevolent stars”
Similar: malefic, malevolent, evil
adjective
evil or harmful in nature or influence
“prompted by malign motives”
verb
speak unfavorably about
“She badmouths her husband everywhere”
Similar: badmouth, traduce, drag through the mud
Word family
malignment · malignity · malignly · maligned · maligning