noun: vitriol 1. cruel and bitter criticism.

vit·ri·ol
ˈvitrēəl,ˈvitrēˌôl/
noun
noun: vitriol

1.
cruel and bitter criticism.
“her mother’s sudden gush of fury and vitriol”
2.
archaicliterary
sulfuric acid.

Origin
late Middle English (denoting the sulfate of various metals): from Old French, or from medieval Latin vitriolum, from Latin vitrum ‘glass.’
Translate vitriol to
Use over time for: vitriol