vitriol
n.extremely strong and angry words used to criticize someone. It is a very formal word for being very rude or mean.
n.extremely harsh or bitter language used to criticize or attack someone. Often used to describe a tone of speech or writing that is intentionally cruel or spiteful.
“The politician's speech was full of vitriol toward his opponents.”
“The review was filled with vitriol, making it difficult for the reader to focus on the actual performance.”
“While the debate was heated, the moderator managed to keep the vitriol at bay, ensuring that the discussion remained focused on policy rather than personal insults.”
“On that last front, Trump succeeded, as Canadians reacted to this outrageous decision with their own vitriol and bluster.”
“As a result, when it premiered, parochialism-driven vitriol was expected on the US side.”
From Middle English vitriol, from Old French vitriol, from Medieval Latin vitriolum (“sulfuric acid”), from vitrum (“glass”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.