Nonplussed meaning

Bewildered; unsure how to respond or act.
adjective
6
0
(proscribed, US, informal) Unfazed, unaffected, or unimpressed.
adjective
3
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Simple past tense and past participle of nonplus.
verb
3
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Origin of nonplussed

  • From Latin non plus (“no more, no further”).

    From Wiktionary