embittered
🇺🇸
/ɪmˈbɪtərd/
🇬🇧
/ɪmˈbɪtəd/
feeling or showing a lot of anger or unhappiness about something that happened in the past
The embittered employee complained about the company's unfair treatment.
那个愤愤不平的员工抱怨公司的不公平待遇。