Verbs

(v)badmouth, malign, traduce, drag through the mudspeak unfavorably about“She badmouths her husband everywhere”

Adjectives

(a)malignevil or harmful in nature or influence“prompted by malign motives”, “believed in witches and malign spirits”, “gave him a malign look”, “a malign lesion”
(s)malefic, malevolent, malign, evilhaving or exerting a malignant influence“malevolent stars”, “a malefic force”