impugn
[im'pju:n]
vt. 责难；驳斥
参考例子
1.Nobody can impugn his ability.
没有人对他的能力表示怀疑。
2.I wish in no way to impugn the potential validity of gradualism.
我想我绝不非难渐进论的潜在有效性。
3.Bob Herz, the FASB's chairman, decried those who "impugn our motives".
FASB主席BobHerz（鲍伯
英文解释
v.
1.attack as false or wrong
网络释义
impugn
指责; 打击; 责难; 怀疑;
impugn - champion
对品格产生怀疑的指责 - 支持;