adjective
adjective: nonplussed; adjective: non-plussed
1.
so surprised and confused that one is unsure how to react.
"Henry looked completely nonplussed"
Similar:
confused
bewildered
bemused
puzzled
perplexed
baffled
stumped
mystified
stupefied
muddled
befuddled
fuddled
dumbfounded
at sea
at a loss
at sixes and sevens
thrown (off balance)
taken aback
disoriented
disconcerted
discomposed
troubled
discomfited
unnerved
shaken
shaken up
dazed
stunned
surprised
astonished
astounded
flummoxed
bamboozled
discombobulated
clueless
fazed
floored
foxed
bushed
wildered
mazed
distracted
2.
INFORMAL•NORTH AMERICAN
not disconcerted; unperturbed.