resentment
/ɹɪˈzɛntmənt/noun
A lasting feeling of anger or bitterness about being treated unfairly.
Example sentences
- “She felt a flash of resentment when her brother got all the credit.”
- “Years of low pay created deep resentment among the factory workers.”
You 'harbor' or 'nurse' resentment 'toward' or 'against' someone. The word implies a grievance kept warm over time.