imbitter

/ɪmˈbɪtər/
verb
  1. To make someone feel bitter, resentful, or unhappy, often because of unfair treatment or disappointment.
    • He refused to let past failures imbitter his outlook on life.
    • The unfair criticism seemed to imbitter her, making her distrustful of others.
    • Years of rejection began to imbitter the artist against the gallery system.
  2. To make something unpleasant or harsh in flavor or character.
    • The argument imbittered the otherwise pleasant evening.
    • Adding too much grapefruit juice can imbitter the cocktail.
    • The chef warned that burning the garlic would imbitter the sauce.
Antonyms
What does "imbitter" mean? | whatsthatwordmean | whatsthatwordmean