verb
Uncommon
counteract
KOWN-tuhr-akt
Counteract (verb) means to reduce or cancel out the effect of something by acting in an opposing way. Example: “The medicine counteracts the side effects of the treatment.”
verb
1
To reduce or cancel out the effect of something by acting in an opposing way.
"The medicine counteracts the side effects of the treatment."
"Regular exercise helps counteract the effects of a sedentary job."
How to use counteract
Learner’s notesIn plain EnglishTo act against something in order to cancel out or lessen its effect.
Common pairings
counteract the effects
counteract a threat
Vocabulary Flow
Build your vocabulary from words like counteract.
Vocabulary Flow serves the next word, and the next — meaning, pronunciation and an example each time. Practice at your level, or learn English in your own language.
Start vocabulary practice
Word forms
- Plural
- counteracts
- Third person singular
- counteracts
- Past tense
- counteracted
Fill the gap
Can you complete this real example?
The medicine _____ the side effects of the treatment.
Etymology
From counter- ("against") + act.
Synonyms
View more →Antonyms
Related words
Rhymes for counteract
See all rhymes for counteract →Frequently asked questions
What does “counteract” mean?
The word “counteract” means to reduce or cancel out the effect of something by acting in an opposing way. In plain terms, to act against something in order to cancel out or lessen its effect.
How do you pronounce “counteract”?
“Counteract” is pronounced KOWN-tuhr-akt (/ˈkaʊntəɹˌækt/ in IPA).
How do you use “counteract” in a sentence?
Here is “counteract” used in a sentence: “The medicine counteracts the side effects of the treatment.”
What is another word for “counteract”?
Words with a similar meaning to “counteract” include countervail, counterwork and remedy.
What is the opposite of “counteract”?
The opposite of “counteract” — its antonyms — are abet, assist, help, reinforce and support.
What part of speech is “counteract”?
“Counteract” is a verb.
Is “counteract” a common word?
“Counteract” is an uncommon word in modern English.
