nonplus

Verb

Synonyms: perplex vex stick get puzzle mystify baffle beat pose bewilder flummox stupefy

WordNet 3.0

Verb (1)

be a mystery or bewildering to“This beats me!”“Got me--I don't know the answer!”“a vexing problem”“This question really stuck me”Synonyms: perplex vex stick get puzzle mystify baffle beat pose bewilder flummox stupefy gravel amaze dumbfound

Webster's Dictionary (GCIDE)

Nonplus \Non"plus`\, v. t. [imp. & p. p. Nonplusedor Nonplussed; p. pr. & vb. n. Nonplusing or Nonplussing.] To puzzle; to confound; to perplex; to cause to stop by embarrassment. [1913 Webster]

He has been nonplused by Mr. Dry's desiring him to tell what it was that he endeavored to prove. --Spectator. [1913 Webster]

Nonplus \Non"plus\, n. [L. non not + plus more, further. See Plural.] A state or condition which baffles reason or confounds judgment; insuperable difficulty; inability to proceed or decide; puzzle; quandary. [1913 Webster]

Both of them are a perfect nonplus and baffle to all human understanding. --South. [1913 Webster]