counteract

coun·ter·act

transitive verb \ˌkau̇n-tər-ˈakt\

: act against (something) : to cause (something) to have less of an effect or to have no effect at all

Full Definition of COUNTERACT

:  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>

— coun·ter·ac·tion \-ˈak-shən\ noun

— coun·ter·ac·tive \-ˈak-tiv\ adjective

Examples of COUNTERACT

1. The drug will counteract the poison.
2. <this medication will counteract the symptoms but it won't kill the infection>

First Known Use of COUNTERACT

1655

Related to COUNTERACT

Synonyms

annul, cancel (out), compensate (for), correct, offset, counterbalance, counterpoise, make up (for), negative, neutralize

Related Words

invalidate, negate, neuter, nullify; atone (for); outbalance, outweigh, redeem; redress, relieve, remedy; override, overrule

Rhymes with COUNTERACT

abreact, artifact, cataract, chain-react, cross-react, eye contact, inexact, interact, overact, precontact, razor-backed, reenact, riot act, subcompact, subcontract, tesseract, underact, vacuum-packed, ventifact

coun·ter·act

transitive verb \ˌkau̇nt-ə-ˈrakt\   (Medical Dictionary)

Medical Definition of COUNTERACT

: to make ineffective or restrain or neutralize the usually ill effects of by an opposite force <vitamin K counteracts the effects of warfarin>

—coun·ter·ac·tion \-ˈrak-shən\ noun