Synonyms for Malign (same or very similar meaning)
WordNet sense 1 (speak unfavorably about):
badmouth, traduce, drag through the mudWordNet sense 2 (tending to cause great harm):
evil, harmfulWordNet sense 3 (having or exerting a malignant influence):
malefic, malevolentWordNet sense 4 (harmful or evil in intent or effect):
maleficent, maleficentFrom the ODE community, based on WordNetadd/edit