resentment
//rɪˈzɛntmənt//
Noun
resentmentSingular
resentmentsPlural
1
A feeling of bitter indignation or persistent ill will resulting from a real or perceived wrong, injustice, or unfair treatment.
She felt deep resentment toward her colleague who took credit for her work.
2
A deep-seated anger or hostility held toward someone or something over time.
She still holds resentment toward her former boss for the unfair treatment.