rejoinder
/rɪˈdʒɔɪndə(r)/noun
1- a reply, especially a sharp or witty one应答, 应对; （冷嘲热讽的）回答, （俏皮的）应答：
she would have made some cutting rejoinder but none came to mind.
她本想说句有分量的挖苦话来回答, 却一句也想不起来。
1.1
- Law, dated a defendant's answer to the plaintiff's reply or replication【律】〈旧〉（被告对原告辩驳的）答辩。
词源
late Middle English: from Anglo-Norman French rejoindre (infinitive used as a noun) （see REJOIN2）.