counteract
verb
coun·ter·act
ˌkau̇n-tər-ˈakt 
counteracted; counteracting; counteracts
: 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
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
For one thing, the lander is much more broad at its base with a low center of gravity, which Scholtes said is to counteract the challenge of low gravity that can lead to tipping.
—
Richard Tribou, Orlando Sentinel, 2 Mar. 2025
The brand’s latest innovation, 1-hour Energy, is a smaller, fast-acting version of its popular energy shot, designed specifically to counteract the fatigue caused by the time change.
—Emily Price, Forbes, 2 Mar. 2025
That green pigment comes from centella asiatica (cica), a skin-care staple that counteracts redness and soothes irritation.
—Jennifer Hussein, Allure, 28 Feb. 2025
It’s meant to help the skin and muscles relax to counteract the signs of aging by smoothing folds and wrinkles.
—Enrica Petraglia, Vogue, 25 Feb. 2025
See All Example Sentences for counteract
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Richard Tribou, Orlando Sentinel, 2 Mar. 2025
The brand’s latest innovation, 1-hour Energy, is a smaller, fast-acting version of its popular energy shot, designed specifically to counteract the fatigue caused by the time change.
—Emily Price, Forbes, 2 Mar. 2025
That green pigment comes from centella asiatica (cica), a skin-care staple that counteracts redness and soothes irritation.
—Jennifer Hussein, Allure, 28 Feb. 2025
It’s meant to help the skin and muscles relax to counteract the signs of aging by smoothing folds and wrinkles.
—Enrica Petraglia, Vogue, 25 Feb. 2025
See All Example Sentences for counteract
Cite this Entry
“Counteract.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/counteract. Accessed 5 Mar. 2025.
Copy CitationKids Definition
counteract
verb
coun·ter·act
ˌkau̇nt-ə-ˈrakt
: to lessen the force, action, or influence of : offset
a drug that counteracts a poison
Medical Definition
counteract
transitive verb
coun·ter·act
ˌkau̇nt-ə-ˈrakt
: to make ineffective or restrain or neutralize the usually ill effects of by an opposite force
vitamin K counteracts the effects of warfarin
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