counteract
verb (used with object)
to act in opposition to; frustrate by contrary action.
have counteracted
-
present perfectof counteract.present perfect
Used to describe actions that started in the past and continue into or have direct relevance to the present.
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.
And one 10-second play from Friday’s Game 2 shows just how the Knicks have counteracted the player known as The Alien—by manipulating space and time.
From The Wall Street Journal ● Jun. 7, 2026
Latoya took solace in believing that MaKenzie’s warmth may have counteracted the harsh tone of his teachers.
From The New Yorker ● Sep. 24, 2018
Plunging home values have counteracted the so-called wealth effect that spurred people to spend money as real estate values grew.
From BusinessWeek ● Dec. 8, 2011
But if they had been alerted to the plan, their anxiety could have counteracted the sedative.
From "Artemis Fowl" by Eoin Colfer
In their homes other good qualities must have counteracted the pernicious effect of this mistaken procedure.
From Study of Child Life by Marion Foster Washburne
