perturb
Americanverb (used with object)
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perturbs,
present (3rd person singular)
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perturbed,
past participle, past
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perturbing
present participle
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to disturb or disquiet greatly in mind; agitate.
I can see how such a massive change in your routine would perturb you.
- Antonyms:
- pacify
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to throw into great disorder.
Huge construction projects can take years to finish, and meanwhile, can greatly perturb the neighborhood.
- Synonyms:
- muddle, disarrange, confuse
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Astronomy. to cause perturbation in the orbit of (a celestial body).
verb
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to disturb the composure of; trouble
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to throw into disorder
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physics astronomy to cause (a planet, electron, etc) to undergo a perturbation
Other Word Forms
Derived Forms
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perturbabilitynoun
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perturbatornoun
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perturbernoun
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perturbmentnoun
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nonperturbableadjective
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nonperturbingadjective
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perturbableadjective
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perturbatiousadjective
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perturbingadjective
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unperturbableadjective
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unperturbingadjective
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perturbablyadverb
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perturbinglyadverb
Inflected Forms
Participles
Conjugated Forms
Present
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perturbsimple
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perturbssimple
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have perturbedperfect
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has perturbedperfect
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am perturbingprogressive
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are perturbingprogressive
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is perturbingprogressive
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have been perturbingperfect progressive
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has been perturbingperfect progressive
Past
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perturbedsimple
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had perturbedperfect
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was perturbingprogressive
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were perturbingprogressive
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had been perturbingperfect progressive
Future
Etymology
Origin of perturb
First recorded in 1325–75; Middle English perturben (from Old French perturber ), from Latin perturbāre “to throw into confusion,” from per- per- + turbāre “to agitate, confuse” ( see turbid)
Explanation
To perturb is to bug or bother someone by confusing them or throwing them off balance. You can try, but it's almost impossible to perturb the guards outside Buckingham Palace. If you're having trouble getting used to the word perturb, you're in luck! It's similar in meaning to the verb "disturb." That's right, to perturb is to disturb, but in a way that suggests you're throwing it off its usual path or routine. The movie Born Free truly perturbed widespread views about animals—people suddenly started seeing them as individuals. If you stare at a person you don't know, it won't be long before you perturb them.
Vocabulary lists containing perturb
Grade 9, List 5
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The God of Small Things
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List 3
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
"This technology lets us perturb hundreds to thousands of genes in parallel and then measure the detailed molecular changes in each individual cell," says Cao.
From Science Daily ● May 21, 2026
Some possible treatments have looked to block the origin of the itch to relieve the sensation, Gualdani said, “but it seems if we perturb this pathway, we also perturb eventual itch relief.”
From The Wall Street Journal ● Feb. 21, 2026
“We can perturb, we can manipulate, we can knock out every possible mouse or human gene,” Fu says.
From Scientific American ● Aug. 26, 2022
Because it's so vast, and so poorly understood, Prof Schmidt added, "the worry is that we'll start destroying those ecosystems - and perturb all these vital processes - that we really don't understand".
From BBC ● Nov. 9, 2021
The news didn’t perturb him as much as excite his curiosity.
From "The God of Small Things" by Arundhati Roy
The main problem with room temperature is thermal noise, which perturbs delicate quantum dynamics.
From Science Daily ● Feb. 14, 2024
Perhaps this marks the beginning of a pop culture reconsideration of America’s role in the war, adding nuance that perturbs the accepted heroic narrative.
From Seattle Times ● Dec. 20, 2022
He’s become an itinerant street performer who rivets and perturbs spectators with his uncanny ability to reproduce the physical appearance of anyone in his audience.
From Washington Post ● Sep. 27, 2022
Alade Adeleke: It perturbs the coastal ecosystem, the water system changes, the fisheries is affected.
From Scientific American ● Dec. 17, 2021
All unknown to herself, it wraps its owner round with airs the which to breathe uplifts the spirit, and yet, may be, perturbs the heart, of man.
From Hints for Lovers by T. Arnold (Theodore Arnold) Haultain
Investors don’t appear to be perturbed by the prospect of tighter monetary policy, they say, citing that holdings in gold exchange-traded funds have risen in recent sessions.
From The Wall Street Journal ● Sep. 18, 2026
Not that McIlroy seemed perturbed as the wind gusted beyond 30mph across the 7,440-yard track.
From BBC ● Jun. 18, 2026
Whenever grief has perturbed him, Caballero has processed it through creativity.
From Los Angeles Times ● May 29, 2026
More curiously, even though U.S. high-yield spreads are at post-1998 lows, few investors seemed to be unduly perturbed here.
From MarketWatch ● Dec. 18, 2025
Ampleforth marched clumsily out between the guards, his face vaguely perturbed, but uncomprehending.
From "1984" by George Orwell
“It’s perturbing and upsetting,” said Mark Bookbinder, a 68-year-old engineer who lives in Cincinnati.
From The Wall Street Journal ● Oct. 15, 2025
It’s a perturbing relationship; I feel as though my continued shunning of organized religion has in a sense estranged me from the memory of some very important people.
From Salon ● Mar. 31, 2024
Changes in the spin state can be observed by shining a laser through the material to see how many defects are "on" or "off" after perturbing them.
From Science Daily ● Oct. 25, 2023
This is because the smoke has disrupted this dynamic growth pattern, as opposed to just perturbing a more stable system like an adult.
From Slate ● Jun. 8, 2023
But we have also been perturbing the climate in the opposite sense.
From "Cosmos" by Carl Sagan
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
