addled
at a loss
at a nonplus
at a stand
at a standstill
at an impasse
baffled
bamboozled
beat
bewildered
buffaloed
confounded
dazed
floored
fuddled
in a dilemma
in suspense
licked
muddled
mystified
nonplussed
on tenterhooks
perplexed
puzzled
stuck
thrown
bumped
dumped
humped
jumped
lumped
plumped
pumped
slumped
thumped
trumped