counteract

[ koun-ter-akt ]
/ ˌkaʊn tərˈækt /
See synonyms for: counteract / counteracting on Thesaurus.com

verb (used with object)

to act in opposition to; frustrate by contrary action.

QUIZZES

LEARN THE SPANISH WORDS FOR THESE COMMON ANIMALS!

Are you learning Spanish? Or do you just have an interest in foreign languages? Either way, this quiz on Spanish words for animals is for you.
Question 1 of 13
How do you say “cat” 🐈 in Spanish?

Origin of counteract

First recorded in 1670–80; counter- + act

OTHER WORDS FROM counteract

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for counteract

British Dictionary definitions for counteract

counteract
/ (ˌkaʊntərˈækt) /

verb

(tr) to oppose, neutralize, or mitigate the effects of by contrary action; check

Derived forms of counteract

counteraction, nouncounteractive, adjectivecounteractively, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012