nonplussed

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nonplussed

  • /nɒnˈplʌst/ UK
  • /ˌnɑnˈplʌst/ US

Rhymes with -ʌst

Where it comes from

From nonplus (“state of bewilderment or perplexity”, noun) or nonplus (“to bewilder or perplex (someone)”, verb) + -ed (suffix forming adjectives, and the past tense and past participle forms of verbs). Nonplus (noun) is derived from Latin nōn plūs (“no further, no more”), from nōn (“not”) + plūs (“additionally, more; further”) (ultimately from Proto-Indo-European *pleh₁- (“to fill”)). The etymological sense is similar to being left speechless as a result of confusion: the nonplussed person can say or do “no more”.

Adjective sense 2 (“unaffected”) is probably from a misinterpretation of the first element of the word as the prefix non- meaning “not”.

adjective more nonplussed · most nonplussed · non-plussed

  1. Unsure how to act or respond; bewildered, perplexed. [N]ote the honeſt Quaker vvas nonpluſſed, and greatly ſurprized at that Queſtion.

    Similar: confounded, vexed, lost for words, addle-pated, addled, addlepated, at a loss, at a loss for words, at sea, at sixes and sevens, baffled, befuddled · Opposite: plussed

  2. US, informal, nonstandard Unaffected, unfazed; unimpressed. "I regard Dean [W. P.] Baddeley's gambling activities with embarrassment and dismay," said Anglican dean of Melbourne S. Barton Babbage. […] The Rev. Baddeley remained nonplussed. "I don't intend to make a habit of going to the races but I feel clergymen should mix as our Lord did with all walks of

    Similar: blasé, jaded, adiaphroistic, apathetic, apathistical, blithe, deaf, cool, shiftless, dispassionate, dull, enervated · Opposite: plussed

verb non-plussed

  1. participle, past simple past and past participle of nonplus

Translations

Every language

adj unsure how to act or respond — see also bewildered, perplexed

Españolperplejo
हिन्दीभौचक bhaucak
Portuguêsdesconcertado, perplexo
Françaisdéconcerté, interloqué, perplexe
Deutschverblüfft
Italianoperplesso
Русскийрасте́рянный rastérjannyj

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Cite this
MLA

"nonplussed." Wiktionary, via Micwyn, micwyn.com/word/nonplussed. Accessed 6 Nov. 2026.

APA

nonplussed. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/nonplussed

Chicago

"nonplussed." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/nonplussed.

BibTeX
@misc{nonplussed_2026,
  title = {nonplussed},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/nonplussed},
  urldate = {2026-11-06}
}