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(adj) sulfurous, sulphurous, caustic, blistering, bitter, acerb, acerbic, acid, acrid, vitriolic
harsh or corrosive in tone
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
extremely poisonous or injurious; producing venom
venomous snakes; a virulent insect bite