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Noun: bitterness  bi-tu(r)-nus
  1. A feeling of deep and bitter anger and ill-will
    "his bitterness took the form of extreme hostility";
    - resentment, gall, rancor [US], rancour [Brit, Cdn], ill feeling, hard feelings, acrimoniousness, bile
  2. A rough and bitter manner
    - acrimony, acerbity, jaundice, tartness, thorniness
  3. The taste experience when quinine or coffee is taken into the mouth
    - bitter
  4. The property of having a harsh unpleasant taste
    - bitter

Type of: disagreeableness, enmity, gustatory perception, gustatory sensation, hostility, ill will, taste, taste perception, taste property, taste sensation

Encyclopedia: Bitterness