impugn

1. V-T If you impugn something such as someone's motives or integrity, you imply that they are not entirely honest or honourable. 指責(zé); 質(zhì)疑[正式]

The Secretary's letter impugns my motives. 該部長(zhǎng)的來(lái)函質(zhì)疑我的動(dòng)機(jī)。