Main entry: virulent
Definition: infectious; having the ability to cause disease
Antonyms: avirulent
Definition: not virulent; unable to produce disease
Main entry: sulfurous, sulphurous, caustic, blistering, bitter, acerb, acerbic, acid, acrid, virulent, vitriolic
Definition: harsh or corrosive in tone
Usage: an acerbic tone piercing otherwise flowery prose; a barrage of acid comments; her acrid remarks make her many enemies; bitter words; blistering criticism; caustic jokes about political assassination, talk-show hosts and medical ethics; a sulfurous denunciation; a vitriolic critique
Antonyms: pleasant
Definition: affording pleasure; being in harmony with your taste or likings
Main entry: deadly, venomous, virulent
Definition: extremely poisonous or injurious; producing venom
Usage: venomous snakes; a virulent insect bite