adjective
exceedingly harmful or destructive
pernicious gossip
Synonyms: baneful, deadly, noxious, pestiferous, pestilent, pestilential; compare deadly 1
Related Word: damaging, deleterious, detrimental, harmful, hurtful; baleful, malefic, maleficent, malign, sinister; miasmatic, miasmic, poisonous, toxic, venomous; malignant, swart, virulent; destructive, devastating, ruinous; fatal, killing, lethal, mortal
Contrasted words: harmless, uninjurious; nonmalignant, nonpoisonous, nontoxic
Antonyms: innocuous