nonplus

American  

[non-pluhs] / nɒnˈplʌs /

verb (used with object)

nonplussed, nonplused, nonplussing, nonplusing

1. to render utterly perplexed by something unexpected; puzzle completely.

   He nonplussed his questioners by answering in riddles.

   Synonyms:

   disconcert, confound, confuse, perplex

2. to cause to feel indifferent, calm, or unexcited.

   The shoppers were entirely nonplussed by the disturbance in the street, continuing to gaze at window displays as they strolled along.

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noun

1. a state of utter perplexity.

   When the protagonist's wife suddenly disappears, he's at a nonplus and fights with two different feelings.

nonplus British  

/ nɒnˈplʌs /

verb

1. (tr) to put at a loss; confound

   he was nonplussed by the sudden announcement

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noun

1. a state of utter perplexity prohibiting action or speech

Usage

See nonplussed ( def. ).

Etymology

Origin of nonplus

First recorded in 1575–85; (noun) from Latin nōn plūs literally, “not more, no further,” that is, a state in which nothing more can be done

Explanation

To nonplus is to baffle or confuse someone to the point that they have nothing to say. Something weird and mysterious can nonplus you, like a play that is performed entirely by chickens. If you know a little French or Latin, you'll recognize that "non plus" means "no more." When something bewildering nonpluses you, there's no more you can say or do about it. A goal of getting poor grades, running with a bad crowd, and refusing to eat would leave your parents nonplussed. Sometimes people misuse nonplus to mean "unimpressed," but that's not correct: to nonplus is to puzzle, confuse, and dumbfound.

Example Sentences

See Examples For:

nonplus nonplused nonplussed nonplussing

He found cross-examinations mentally invigorating, soon learned that he could nonplus storming attorneys if he kept smiling no matter how galling their insinuations.

From Time Magazine Archive

Ah! there Roy could not answer him; he was at a nonplus; he was unable to say whether the codicil had been found or not.

From Verner's Pride by Mrs. Henry Wood

But it must needs be condemned, because it renders the character of the term ambiguous, and is such a grammatical difficulty as puts the parser at a dead nonplus.

From The Grammar of English Grammars by Goold Brown

It seems, however, that, in common with myself, your numerous correspondents are quite at a nonplus.

From Notes and Queries, Number 179, April 2, 1853. A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc by George Bell

Though to distinguish beasts of prey A novice might nonplus; Yet from the Crocodile you may Tell the Hyena, thus: 'Tis the Hyena if it smile; If weeping, 'tis the Crocodile.

From The Wit and Humor of America, Volume IV. (of X.) by Marshall Pinckney Wilder

Leigh Rosser was similarly nonplused while describing his biggest challenge as design fabrication lead.

From New York Times ● Apr. 1, 2024

Nicholas Elliott, Philby’s closest friend and a fellow member of the foreign intelligence agency MI6, looks slightly nonplused.

From New York Times ● Mar. 3, 2023

In response to Mr. Zhao’s accusations, Mr. Bankman-Fried seemed nonplused.

From New York Times ● Dec. 9, 2022

And this, in turn, has left some of his peers nonplused — grumbling at what they see as a flimsy theory or bewildered as to why Harvard’s top astronomer won’t shut up about aliens.

From Washington Post ● Feb. 4, 2019

“I sure could use some lumber for my front porch,” he said, nonplused.

From "October Sky" by Homer Hickam

It featured Evan, Anthony and Zachary performing a rendition of Hilary Duff’s “What Dreams Are Made Of” before a crowd of nonplussed seniors, while Darshan danced along next to them on a laptop screen.

From The Wall Street Journal ● Jan. 28, 2026

In a brief phone interview, a worker at Unique Bite Eatery in Indio appeared nonplussed and said there was no damage at the restaurant.

From Los Angeles Times ● Jan. 19, 2026

Currencies, bonds, and stocks appeared to be nonplussed.

From Barron's ● Jan. 16, 2026

But Rotem Naftalovich, of Rutgers University in New Jersey, one of the three researchers involved, said the US food regulator was nonplussed by the admittedly "wonky" idea.

From BBC ● Sep. 19, 2025

I was nonplussed, and I blurted out that I was astounded that he could not see himself how damnably false this story was.

From "Long Walk to Freedom" by Nelson Mandela

Weaver, however, verged on nonplussing co-hosts Brian Williams and Rachel Maddow, as well as reporter Steve Kornacki, MSNBC's millennial version of CNN's king-of-the-"Magic Wall" John King.

From US News ● Apr. 20, 2016

He received visitors with the graciousness of the courteous head of a department, who resigns himself to listen to demands, allowing them to talk as he smiled faintly, and nonplussing them by his calmness.

From Une Vie, a Piece of String and Other Stories by Guy de Maupassant

The question was awkward, nonplussing Jerky, and, the second time, calling for explanation from his sister; who, however, promptly vouchsafed it.

From No Quarter! by Mayne Reid

Dismissing this nonplussing phase, I turned to the subject of the gem once more.

From The Paternoster Ruby by Charles Edmonds Walk

While his powers of discussion of a subject were great, the power that especially characterized him was that of nonplussing his antagonist with a snub or a sarcasm.

From The Brothers' War by John Calvin Reed

Related Words

• astonish
• astound
• baffle
• bewilder
• daze
• disconcert
• dumbfound
• faze
• fluster
• mystify