1. (

• resentment ,
• bitterness ,
• gall ,
• rancor ,
• rancour

) a feeling of deep and bitter anger and ill-will ;

2. (

• bitterness ,
• acrimony ,
• acerbity ,
• jaundice ,
• tartness ,
• thorniness ,

) a rough and bitter manner ;

3. (

• bitter ,
• bitterness

) the taste experience when quinine or coffee is taken into the mouth ;

4. (

• bitterness ,
• bitter

) the property of having a harsh unpleasant taste ;