malign -
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"
benignant,
benign characterized by kindness and warm courtesy especially of a king to his subjects; "our benignant king"
harmful causing or capable of causing harm; "too much sun is harmful to the skin"; "harmful effects of smoking"