1
impugn sth
The lawyer impugned the witness's testimony.
律师质疑证人的证词。
质疑；抨击；怀疑
impugned — past of impugn
先理解核心含义，再看它在真实句子里的用法。
质疑；抨击；怀疑
to attack or question the truth, validity, or motives of something; to cast doubt on it
The lawyer impugned the witness's testimony.
律师质疑证人的证词。
正式用语，指公开质疑或抨击他人的观点、动机或行为。
口头攻击,尤指反对某种观点、动机或行为；质疑其真实性或有效性；使产生怀疑。
To verbally assault, especially to argue against an opinion, motive, or action; to question the truth or validity of; cast doubt on.
impugn
Base
原形
impugns
3rd person
第三人称单数
impugning
-ing
现在分词
impugned
Past
过去式
impugned
Past participle
过去分词
Critics impugn the committee's motives.
批评者质疑委员会的动机。
The lawyer impugned the witness's credibility.
律师质疑了证人的可信度。
No one has impugned her integrity.
没有人质疑过她的正直。
质疑；攻击
She impugned her colleague's motives during the team meeting, which made everyone uncomfortable.
她在团队会议上质疑同事的动机，这让所有人都感到不舒服。
The article impugns the company's safety record by listing several past accidents.
这篇文章通过列举几起过去的事故来质疑公司的安全记录。
By impugning the teacher's fairness, the student made the whole class doubt the grading.
通过质疑老师的公正性，这个学生让全班都对评分产生了怀疑。
The lawyer impugned the witness's testimony.
律师质疑证人的证词。
常与 motive、integrity、honesty 等表示品性或意图的名词搭配。
She impugned his motives during the debate.
她在辩论中质疑他的动机。
被动结构常用，主语是受到质疑的人或事物。
His integrity was impugned by the accusation.
他的正直因这项指控而受到质疑。
Not this
His impugn of my motives was cruel.
Use this
His impugning of my motives was cruel.
impugn 是动词，不能像名词一样用在物主代词后作主语；应改用动名词形式 impugning。
Not this
She impugned against his sincerity.
Use this
She impugned his sincerity.
impugn 是及物动词，直接接宾语，不需要介词 against；不能把中文“反对/攻击”里的介词概念套用到英语。
Not this
They impugned that the report was accurate.
Use this
They impugned the accuracy of the report.
impugn 的宾语必须是名词短语，不能接 that 从句；表示“质疑报告是否准确”应改用名词短语 the accuracy of the report。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
质疑某人的动机
The lawyer tried to impugn the witness's motives.
律师试图质疑证人的动机。
诋毁某人的正直
He felt his reputation was attacked when they impugned his integrity.
当他们诋毁他的正直时，他感到自己的名誉受到了攻击。
质疑某事的有效性
The report impugns the validity of the study's conclusions.
该报告质疑了研究结论的有效性。
抨击某人的人格
She refused to impugn his character in the debate.
她拒绝在辩论中抨击他的人格。
质疑证据
The defense impugned the evidence presented by the prosecution.
辩方质疑了检方提出的证据。
质疑某人的诚实
No one could impugn her honesty.
没有人能质疑她的诚实。
Use impugned naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把对方观点当作沙袋，上去一顿拳打脚踢般地质疑抨击——impugn 就是这种猛烈攻击。
语域：formal 常见场景：formal writing、legal argument、academic debate impugn 是较正式的动词，通常用于书面语，多出现在法律、学术或公开辩论等场合，表示质疑或抨击观点、动机等；日常口语中比较少见。
发音以第二音节为重音，含 /pjuːn/。immune /ɪˈmjuːn/、tune /tjuːn/（英式）、dune /djuːn/（英式）与 impugn 押韵（都含 /juːn/）；注意美式英语中 tune 和 dune 常读作 /tuːn/、/duːn/，不再押韵。impute /ɪmˈpjuːt/ 拼写与发音都接近 impugn，但结尾是 /t/；sign 和 pugnacious 是容易混淆的形近词：sign 中 g 不发音（/saɪn/），pugnacious 中 g 读 /g/，两者都与 impugn 不同。
Dictionary facts from ECDICT, WIKTIONARY.