“虧待”的英文翻譯可以根據具體語境選擇不同的表達：

1. **Mistreat** - 指虐待或不公正地對待。
- 例句：He felt he had been mistreated by his employer.（他覺得被雇主虧待了。）

2. **Treat unfairly** - 強調不公平的對待。
- 例句：No one should be treated unfairly because of their background.（任何人都不應因出身被虧待。）

3. **Treat shabbily** - 暗示輕視或怠慢。
- 例句：The guests were treated shabbily at the event.（嘉賓們在活動上被虧待了。）

4. **Do wrong by someone** - 口語化表達，指對某人不公。
- 例句：I would never do wrong by my friends.（我絕不會虧待朋友。）

根據具體語境選擇最貼切的譯法即可。