impugn

音标发音

Nobody can impugn his ability.
没有人对他的能力表示怀疑。
dict.cn
The president and his allies regularly impugn Mr Rafsanjani’s integrity and that of his children, one of whom happens to run the Tehran metro.
内贾德和他的同党经常攻击拉夫桑贾尼和他孩子们的正直，其子之一恰巧经营着德黑兰的地铁。
Overly proud people refuse to admit their mistakes — and sometimes even deny the fact that they make them — because they feel that it would impugn their image.
过于自负的人拒绝承认自己的错误 — 甚至有时候否认自己制造错误的事实 — 因为他们感觉那将会打击到自己的形象。

To tolerate Socrates would be to say to him that we care little for our way of life and that we are willing to let you challenge it and impugn it every day.
若是容忍苏格拉底,就像在对他说,我们不是很在意我们的生活方式,我们愿意让你提出挑战并日日进行抨击。
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No thrice-divorced former Oxycontin addict is in a terrific position to impugn anyone's mental balance.
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And no one on this committee at any time should impugn his character or his integrity.
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Not to impugn Pimco's integrity (which I consider the highest), but this view is convenient for that firm.
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to cause people to doubt someone's character, qualities, or reputation by criticizing them

If you impugn something such as someone's motives or integrity, you imply that they are not entirely honest or honourable.