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 And if hyperpigmentation is a recurring event for you, this scrub works to counteract dark spots with niacinamide and licorice extract, which evens your natural skin tone while the granules balance your texture. Alyssa Brascia, Peoplemag, 16 Feb. 2024 The change came amid a series of new voting initiatives geared toward improving voter access, like expanding voting by mail, at a time when other states were placing more restrictions on voting to counteract allegations of voter fraud. Kaia Hubbard, CBS News, 6 Feb. 2024 The device’s EyeSight feature (a display that shows the user’s eyes to others) is meant to counteract the weirdness of being around someone who’s got a computer on their face. Ryan Faughnder, Los Angeles Times, 30 Jan. 2024 General manager Lucy Rushton tried to counteract the youth by adding several veterans through trades and free agency. Jason Mastrodonato, The Mercury News, 22 Jan. 2024 But infrastructure alone may not be enough to counteract slumping EV sales in recent months. Popular Science, 11 Jan. 2024 Governments in the European Union, in Britain and elsewhere are debating how to counteract America’s policies by offering their own incentives to attract investment and keep their companies from relocating to the United States. Eshe Nelson, New York Times, 7 Dec. 2023 But to what degree are the eruption's cooling sulfur aerosols counteracting any warming, and what is the net effect? Tom Yulsman, Discover Magazine, 29 Jan. 2024 To counteract this effect, HWO will require precision optics that can outperform even those of Webb. Dan Falk, Smithsonian Magazine, 29 Jan. 2024 See More

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 1 Mar. 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!