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counteract

verb [T]
 
 
/ˌkaʊn.tərˈækt/ US  /-t̬ɚ.ækt/

Definition

to reduce or remove the effect of something unwanted by producing an opposite effect: Drinking a lot of water counteracts the dehydrating effects of hot weather.Reacting and responding
(Definition of counteract verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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