attenuate
Americanverb (used with object)
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attenuates,
present (3rd person singular)
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attenuated,
past participle, past
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attenuating
present participle
-
to weaken or reduce in force, intensity, effect, quantity, or value.
to attenuate desire.
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to make thin; make slender or fine.
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Bacteriology, Immunology. to render less virulent, as a strain of pathogenic virus or bacterium.
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Electronics. to decrease the amplitude of (an electronic signal).
A splitter will attenuate your output.
verb (used without object)
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attenuates,
present (3rd person singular)
-
attenuated,
past participle, past
-
attenuating
present participle
adjective
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weakened; diminishing.
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Botany. tapering gradually to a narrow extremity.
verb
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to weaken or become weak; reduce in size, strength, density, or value
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to make or become thin or fine; extend
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(tr) to make (a pathogenic bacterium, virus, etc) less virulent, as by culture in special media or exposure to heat
adjective
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diluted, weakened, slender, or reduced
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botany tapering gradually to a point
Other Word Forms
Derived Forms
Inflected Forms
Participles
Conjugated Forms
Present
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attenuatesimple
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attenuatessimple
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have attenuatedperfect
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has attenuatedperfect
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am attenuatingprogressive
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are attenuatingprogressive
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is attenuatingprogressive
-
have been attenuatingperfect progressive
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has been attenuatingperfect progressive
Past
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attenuatedsimple
-
had attenuatedperfect
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was attenuatingprogressive
-
were attenuatingprogressive
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had been attenuatingperfect progressive
Future
Etymology
Origin of attenuate
First recorded in 1520–30; from Latin attenuātus (past participle of attenuāre “to make thin, reduce”); see at-, tenuis, -ate 1
Explanation
Attenuate is a verb that means to make or become weaker. The effects of aging may be attenuated by exercise — or by drinking from the fountain of youth. The versatile word attenuate denotes a weakening in amount, intensity, or value. As a verb, attenuate is usually transitive, meaning it needs an object to be complete, such as in the sentence: "This tanning process tends to attenuate the deer hide, making it softer." The word can be intransitive in past tense, as in "The rain attenuated, ending the storm." And it can even be used as an adjective to describe something weakened: "Even an attenuated solution will remove the stain."
Vocabulary lists containing attenuate
30 GRE Words Beginning with "A"
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Hidden Figures
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A Streetcar Named Desire
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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:
The rigid roof panel helps attenuate the little engine’s effortful ringadingding, which loses its charm after hour four or so.
From The Wall Street Journal ● May 23, 2026
He recognized that if the United States were to have any meaningful relationship with Latin America, we needed to attenuate our colonialism, so he pushed through the ratification of the Panama Canal treaties.
From Los Angeles Times ● Dec. 29, 2024
The researchers were able to show that zooplankton species that are tolerant to oxygen deficiency consume sinking particles and thus attenuate the export fluxes of carbon to the deep sea.
From Science Daily ● Dec. 8, 2023
We therefore believe that sleep and dreams serve to attenuate negative emotions and that this process is dysfunctional in people with depression.
From Scientific American ● Jun. 5, 2023
They went to and fro, and she would not allow Fleda, who laughed and protested, to attenuate with any light civility this spirited picture.
From The Spoils of Poynton by Henry James
"Sound attenuates with distance, so at one metre away, the amplitude is around 108 decibels."
From BBC ● Feb. 26, 2024
Based on this, they hypothesized that DOP activation by KNT-127 suppresses glutamatergic transmission and attenuates PL-BLA-mediated anxiety-like behavior.
From Science Daily ● Feb. 22, 2024
Jane’s quest attenuates as the novel grinds on, months and years falling around her like bodies in a plague year.
From Los Angeles Times ● Mar. 30, 2021
This creates a soft halo that attenuates the contrast between the light source and the surrounding darkness.
From Salon ● Mar. 13, 2017
Even if it were true, how little it would tell us; how it attenuates fact!
From English Critical Essays Nineteenth Century by Edmund David Jones
During its short-lived rescue attempt, the U.S. military contacted dozens of ships, encouraging them to break out, and offered reassurances that the Navy, using AI-powered drones, has attenuated the risk of sea-mines planted by Iran.
From The Wall Street Journal ● May 9, 2026
It’s way too attenuated to fit into the language of the statute, because the tariffs don’t actually “deal with” this threat of fentanyl.
From Slate ● May 29, 2025
The measles virus is attenuated in the MMR vaccine, meaning that it has been altered to produce the appropriate immune response without triggering the disease itself.
From Los Angeles Times ● Apr. 3, 2025
The team had also found in their previous work, that eating high-fat foods attenuated cerebral oxygenation in the pre-frontal cortex, during stress.
From Science Daily ● Nov. 18, 2024
On Mars such a place would be even more interesting, because while the visible light necessary for photosynthesis would penetrate to that depth, the germicidal ultraviolet light would be at least partially attenuated.
From "Cosmos" by Carl Sagan
Far from attacking the root causes of global-warming, activists said, recourse to la clim' was merely attenuating the effects of global-warming.
From BBC ● Jun. 24, 2026
"Taken together, our findings reveal the broad influence retinoic acid has in attenuating vitally important immune responses to cancer," said Kang.
From Science Daily ● Jan. 16, 2026
“Our data confirm that the benefits of vaccination include attenuating disease severity in breakthrough cases,” Barchuk says.
From Science Magazine ● Aug. 26, 2021
Sabin spent years weakening or attenuating the poliovirus by growing it repeatedly in different animals and in cells in the laboratory.
From Salon ● Feb. 21, 2021
This suggested that phosphorus would be a better carrier of therapeutic radiation than radio-sodium, since the latter distributes itself all through the body as salt, attenuating its effect.
From "Big Science" by Michael Hiltzik
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.
