VERB
指責,非難,質疑(他人的動機、誠信等)
If you impugn something such as someone's motives or integrity, you imply that they are not entirely honest or honourable.
例句
The Secretary's letter questions my veracity and impugns my motives...
部長的來信懷疑我的誠實,質疑我的動機。
All I can hope is that the good name of the Bank will not be impugned in some way.
我所希望的,就是該銀行的好名聲不要在某些方面受到質疑。