bitterness
US /ˈbɪt̬.ɚ.nəs/
UK /ˈbɪt̬.ɚ.nəs/

1.
amargura, resentimiento
a feeling of anger, hurt, or resentment due to unfair treatment
:
•
He felt a deep sense of bitterness after being betrayed by his friend.
Sintió una profunda sensación de amargura después de ser traicionado por su amigo.
•
Her voice was full of bitterness as she recounted the injustice.
Su voz estaba llena de amargura mientras relataba la injusticia.
2.
amargor, sabor amargo
the quality of having a sharp, pungent taste or smell; not sweet
:
•
The coffee had a distinct bitterness that some people enjoyed.
El café tenía un amargor distintivo que algunas personas disfrutaban.
•
The medicine left a lingering bitterness in her mouth.
La medicina dejó un amargor persistente en su boca.