disapproval If you refer to what someone says or writes as vitriol, you disapprove of it because it is full of bitterness and hate, and so causes a lot of distress and pain. The vitriol he hurled at members of the press knew no bounds = acrimony, venom
(H2SO4) a highly corrosive acid made from sulfur dioxide; widely used in the chemical industry subject to bitter verbal abuse expose to the effects of vitriol or injure with vitriol