IPA: /rɪˈzɛntmənt/
KK: /rɪˈzɛntmənt/
A strong feeling of anger or displeasure about something that you think is unfair or wrong.
She felt a deep sense of resentment towards her colleague for taking credit for her work.
Resentment is formed from "re-" (meaning again) and "sentire" (meaning to feel). The word describes the act of feeling again, particularly in a negative sense, such as feeling anger or bitterness about something that has happened.
Think of feeling something 'again' ('re-') — that's why resentment means feeling anger or bitterness again about a past event.