impugn uphold赞成
impugn endorse责难
impugn vindicate责难
impugn n指责
impugn - champion支持
impugn a statement驳斥一种言论
impugn a piece of evidence翻译;怀疑证据
to impugn someone's integrity怀疑某人不诚实
V-T（及物动词） If you impugn something such as someone's motives or integrity, you imply that they are not entirely honest or honourable. 指责; 质疑[正式]
The Secretary's letter impugns my motives.
该部长的来函质疑我的动机。