impeach

[1]	charge , accuse , arraign , indict , incriminate , implicate , inculpate , blame , censure
[2]	(call into) question , challenge , attack , disparage , discredit , impugn , deprecate , belittle , asperse , cast aspersions on , declaim , slander , malign , vilify
[3]	accuse , incriminate , criminate