imbittered

/ɪmˈbɪtərd/
adjective
  1. Feeling or showing bitterness, resentment, or anger, especially because of past unfair treatment or disappointment.
    • After losing the election, he became an imbittered critic of the government.
    • Her imbittered tone made it clear she had not forgiven the betrayal.
    • The imbittered employee complained about every new policy.
Antonyms
What does "imbittered" mean? | whatsthatwordmean | whatsthatwordmean