malign
     adj 1: 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" [ant: {benign}]
     2: having or exerting a malignant influence; "malevolent
        stars"; "a malefic force" [syn: {malefic}, {malevolent}, {evil}]
     v : speak unfavorably about; "She badmouthes her husband
         everywhere" [syn: {badmouth}, {traduce}, {drag through
         the mud}]
Source: WordNet® 2.0