Definition of counteract verb from the Oxford Advanced American Dictionary

     

    counteract

     verb
    verb
    NAmE//ˌkaʊntəˈrækt//
     
    counteract somethingVerb Forms present simple I / you / we / they counteract
     
    he / she / it counteracts
     
    past simple counteracted
     
    -ing form counteracting
     
     
    jump to other results
  1. 1to do something to reduce or prevent the bad or harmful effects of something synonym counter
  2. 2 These exercises aim to counteract the effects of stress and tension.
See the Oxford Advanced Learner's Dictionary entry: counteract