Answer: stumped

AnswerCrossword Clue
STUMPEDNonplussed
STUMPEDConfounded
STUMPEDPuzzled for an answer.
STUMPEDPuzzled completely.
STUMPEDElectioneered
STUMPEDWithout an answer
stumpedSTUMP, to baffle (to confound (to confuse (to perplex)))
stumpedany short remaining part
stumpedto walk heavily
stumpedto baffle
stumpedto campaign politically
stumpedthe lower end of a tree after the top is gone