perplexed
addled
at a loss
at a nonplus
at a stand
at a standstill
at an impasse
balked
bamboozled
beat
betrayed
bewildered
bilked
blasted
blighted
buffaloed
chapfallen
confounded
crestfallen
crossed
crushed
dashed
dazed
defeated
disappointed
discomfited
discouraged
dished
disillusioned
dissatisfied
floored
foiled
frustrated
fuddled
ill done-by
ill-served
in a dilemma
in suspense
let down
licked
muddled
mystified
nonplussed
on tenterhooks
out of countenance
puzzled
regretful
sorely disappointed
people
scaffold