Answer: oppugn

AnswerCrossword Clue
OPPUGNCall into question
OPPUGNControvert
OPPUGNQuestion the truth of
OPPUGNQuestion the validity of
OPPUGNTake to task
oppugnCall into question the truth or validity of
oppugnto assail with argument
oppugnto assail by criticism, argument, or action.