counteract

verb

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

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
counteraction noun
counteractive 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 The man was given a dose of Narcan, which can counteract the effects of opioids, but was later pronounced dead, according to the agency. Jakob Rodgers, The Mercury News, 13 Apr. 2024 Hope and momentum from climate techs investors is desperately needed to counteract the recent decline in investment in climate tech. Marianne Lehnis, Forbes, 29 Mar. 2024 Ohtani is the type of player who transcends the sport and counteracts the downward trend in baseball’s national appeal more than anyone else. Harry Enten, CNN, 29 Mar. 2024 His study, which was published in the journal Nature, suggests that climate change is playing a significant enough role in the Earth’s rotation to counteract an opposing trend. Evan Bush, NBC News, 27 Mar. 2024 To counteract this, people install security cameras at their homes, conduct cybersecurity audits to ensure their devices and locations are not being tracked, file police reports, receive orders of protection from harassers, or sometimes even move cities if possible. Ariella Steinhorn, Fortune, 13 Mar. 2024 In other words, the increase in productive capacity helped to counteract inflationary pressures that would arise from more people living in the U.S. Wendy Edelberg and Tara Watson, TIME, 5 Apr. 2024 The Tennessee state House of Representatives passed a bill Monday designed to prevent geoengineering, the practice of intentionally modifying the atmosphere to counteract global warming. Evan Bush, NBC News, 2 Apr. 2024 The idea is to counteract some of the effects of climate change by finding ways to reflect solar radiation. Justine Calma, The Verge, 21 Mar. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'counteract.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1655, in the meaning defined above

Time Traveler
The first known use of counteract was in 1655

Dictionary Entries Near counteract

Cite this Entry

“Counteract.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/counteract. Accessed 24 Apr. 2024.

Kids Definition

counteract

verb
coun·​ter·​act ˌkau̇nt-ə-ˈrakt How to pronounce counteract (audio)
: to lessen the force, action, or influence of : offset
a drug that counteracts a poison
counteraction noun

Medical Definition

counteract

transitive verb
coun·​ter·​act ˌkau̇nt-ə-ˈrakt How to pronounce counteract (audio)
: to make ineffective or restrain or neutralize the usually ill effects of by an opposite force
vitamin K counteracts the effects of warfarin
counteraction noun

More from Merriam-Webster on counteract

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