ai-oàn哀怨

grief and resentment

grief and resentment; sadness and disgruntlement; plaintive and aggrieved; to blame; to grumble about; to complain

English Wiktionary, “哀怨” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E5%93%80%E6%80%A8 · confidence: Medium (Wiktionary)