Synonyms:
- 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,
- on tenterhooks,
- perplexed,
- puzzled,
- stuck,
- stumped,
- thrown