bitterest

/B IH1 T ER0 AH0 S T/
adjective
  1. 1

    Having an acrid taste (usually from a basic substance).

    โ€œThe coffee tasted bitter.โ€

  2. 2

    Harsh, piercing or stinging.

  3. 3

    Hateful or hostile.

    โ€œThey're bitter enemies.โ€

  4. 4

    Cynical and resentful.

    โ€œI've been bitter ever since that defeat.โ€

Synonyms

Antonyms

Source: https://en.wiktionary.org/wiki/bitter, https://en.wiktionary.org/wiki/bitterest