vitriol

/หˆvษช.tษนi.ษ™l/

IPA: /V IH1 T R IY0 AH0 L/

noun
  1. 1

    Sulphuric acid and various metal sulphates.

  2. 2

    (by extension) Bitterly abusive language.

verb
  1. 1

    To subject to bitter verbal abuse.

  2. 2

    To dip in dilute sulphuric acid; to pickle.

  3. 3

    To vitriolize.

Source: https://en.wiktionary.org/wiki/vitriol