counteract

verb
coun·​ter·​act | \ ˌkau̇n-tər-ˈakt How to pronounce counteract (audio) \
counteracted; counteracting; counteracts

Definition of counteract

transitive verb

: to make ineffective or restrain or neutralize the usually ill effects of by means of an opposite force, action, or influence a drug used to counteract fatigue

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Other Words from counteract

counteraction \ ˌkau̇n-​tər-​ˈak-​shən How to pronounce counteraction (audio) \ noun
counteractive \ ˌkau̇n-​tər-​ˈak-​tiv How to pronounce counteractive (audio) \ adjective

Examples of counteract in a Sentence

The drug will counteract the poison. this medication will counteract the symptoms but it won't kill the infection
Recent Examples on the Web Aviation accounts for 2%-3% of greenhouse gas emissions but the sheer volume of plane deliveries in coming years will counteract engine efficiency gains. Chris Bryant | Bloomberg, Washington Post, "Are Passenger Jet Engines Hitting Their Technical Limits?," 13 Nov. 2019 Until the Lion Air crash in Indonesia, airlines and pilots hadn’t been told of the existence of MCAS, which had been installed to counteract the effects of the Max’s larger engines on the existing 737’s airframe. Los Angeles Times, "Boeing sued by Southwest pilots on ‘rush’ to sell unsafe Max," 7 Oct. 2019 Another study also presented Sunday found that lifestyle choices may even counteract genetic predisposition for Alzheimer's. Author: Hannah Natanson, Anchorage Daily News, "Doing these five things could decrease your risk of Alzheimer’s by 60 percent, new study shows," 14 July 2019 Another study also presented Sunday found that lifestyle choices may even counteract genetic predisposition for Alzheimer's. Hannah Natanson, chicagotribune.com, "Doing these 5 things could decrease your risk of Alzheimer’s by 60 percent, new study shows," 12 July 2019 Many of the biggest U.S. airlines are cutting flights and raising fares to counteract rising fuel prices that are threatening a long run of profitability. Andrew Tangel And, WSJ, "Higher Fuel Costs Hit Airlines," 26 July 2018 That’s because such action would allow interest rates to rise -- counteracting the key reason why the Hong Kong dollar has been weakening. Bloomberg.com, "Why Hong Kong’s Central Bank Intervened and Should We Worry?," 19 Apr. 2018 The weight is designed to counteract gravitational forces and helps to balance the cable, which is held up thanks, in part, to centrifugal forces. Jennifer Leman, Popular Mechanics, "Astronomers Have Another Space Elevator Design," 30 Aug. 2019 Your high spirits and upbeat outlook can counteract the pull of pessimism and keep you in forward motion. Tribune Content Agency, oregonlive.com, "Horoscope for Aug. 22, 2019: Happy birthday Kristen Wiig; Leo, whip up something exciting," 22 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'counteract.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of counteract

1655, in the meaning defined above

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Statistics for counteract

Last Updated

16 Nov 2019

Time Traveler for counteract

The first known use of counteract was in 1655

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More Definitions for counteract

counteract

verb
How to pronounce counteract (audio)

English Language Learners Definition of counteract

: act against (something) : to cause (something) to have less of an effect or to have no effect at all

counteract

verb
coun·​ter·​act | \ ˌkau̇n-tər-ˈakt How to pronounce counteract (audio) \
counteracted; counteracting

Kids Definition of counteract

: to make (something) have less of an effect or no effect at all The antidote counteracts the poison.

counteract

transitive verb
coun·​ter·​act | \ ˌkau̇nt-ə-ˈrakt How to pronounce counteract (audio) \

Medical Definition of counteract

: to make ineffective or restrain or neutralize the usually ill effects of by an opposite force vitamin K counteracts the effects of warfarin

Other Words from counteract

counteraction \ -​ˈrak-​shən How to pronounce counteraction (audio) \ noun

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Comments on counteract

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