Counteract

ahd-5
  • transitive verb. To oppose and mitigate the effects of by contrary action; check.
  • The Century Dictionary and Cyclopedia
  • To act in opposition to; hinder, defeat, or frustrate by contrary agency.
  • Synonyms To thwart, check, contravene, cross, neutralize.
  • the GNU version of the Collaborative International Dictionary of English
  • transitive verb. To act in opposition to; to hinder, defeat, or frustrate, by contrary agency or influence.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • verb. To act in opposition to; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • verb. act in opposition to
  • verb. oppose and mitigate the effects of by contrary actions
  • verb. oppose or check by a counteraction
  • verb. destroy property or hinder normal operations
  • Word Usage
    "Another influence we have to counteract is that of newspaper headings and placards which catch the eye of children in the streets and appeal so powerfully to their imagination."
    cross-reference
    Hypernym
    Words that are more generic or abstract
    act  check  contain  control  curb  
    Synonym
    Words with the same meaning
    annul  antagonize  baffle  balance  balk