speak unfavorably about
"She badmouths her husband everywhere"
To make defamatory statements about; to slander or traduce.
evil or harmful in nature or influence
"prompted by malign motives"
"believed in witches and malign spirits"
"gave him a malign look"
"a malign lesion"
having or exerting a malignant influence
"malevolent stars"
"a malefic force"
Evil or malignant in disposition, nature, intent or influence.