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A rejoinder is a reply — and not a soft one. It is the line you throw back, often sharp, clever, or a bit rude. In stories and newspapers you meet “a rejoinder.” In everyday talk people say comeback, retort, or just reply. This word feels formal or literary. Lawyers also inherited it from old French law language, where the was used as a noun for a kind of official answer in court. Though actually, it is a close cousin of rejoin in the old sense “to answer,” not “to join again” — which is the meaning of rejoin that students meet first. So the word looks like joining, but here it is talking.
回嘴、反駁（尤指嗆人的回話）
組成From Middle English, from Middle French rejoindre. In Law French the infinitive was used as a noun. It is a doublet of rejoin.
同家族的字
- rejointhe same French verb; in older English, rejoin can also mean “to answer back”
原始詞典資料6 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
rejoindernoun/ɹɪˈd͡ʒɔɪndɚ/
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lawThe defendant's answer to the replication.
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A response that answers another response.
- "76. ... P-R8(N) mate! Certainly not 76... P-R8(Q), though threatening mate on the move in seven different ways--as 77 Q-N5 mate would have been the painful rejoinder."
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A quick response that involves disagreement or is witty, especially an answer to a question.
- I have passed perhaps more time than any other man of my age and country in visits and assemblies, where the polite persons of both sexes distinguish themselves; and could not without much grief observe how frequently both gentlemen and ladies are at a loss for questions, answers, replies, and rejoinders.
- "I'm starting to-morrow. This is perhaps the last time we shall ever meet." I made an appropriate rejoinder, and he smiled wanly.
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intellectual-propertylawpatent-lawRe-insertion, typically after allowance of a patent application, of patent claims that had been withdrawn from examination under a restriction requirement.
rejoinderverb/ɹɪˈd͡ʒɔɪndɚ/
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To issue a rejoinder.
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To say as a rejoinder.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。