ultimatum

n. /ˌʌltɪˈmeɪtəm/ C2

最后通牒

A final demand whose rejection will result in direct retaliation.

仙境例句

The King gave the Hatter an ultimatum: give your evidence, or lose your head.

国王给帽匠下了最后通牒：要么作证，要么掉脑袋。