Definition of counteract in English:



[with object]
  • Act against (something) in order to reduce its force or neutralize it.

    ‘should we deliberately intervene in the climate system to counteract global warming?’
    • ‘These measures would, moreover, sharply reduce revenue to money-strapped state governments, counteracting the Federal stimulus by forcing many of them to cut back on spending.’
    • ‘The argument was that the discount rate should be reduced to counteract the effect of the higher rate tax on the award.’
    • ‘Going back into schools also counteracts the fall in the number of male teachers and their tendency to give up time to spread the word about their passion for rugby.’
    • ‘Particularly noteworthy is the accounting of the use of such operations by our naval forces worldwide and the positive impact they had in counteracting enemy planning and operations.’
    • ‘For example it may be that heroin addicts choose heroin because it counteracts the rage and aggression they feel, while cocaine may be used to medicate against depression.’
    • ‘Unequally spaced white stripes painted across the road leading up to an off-ramp have been used to create an illusion that counteracts motion adaptation and reduces driving speed.’
    • ‘Formally, this equilibrium is stable, meaning that small deviations from it are counteracted by the system's dynamics.’
    • ‘The resulting charge neutralization counteracts the normal repulsion of the negatively charged phosphate backbone and allows a considerable narrowing of the DNA grooves on the inside.’
    • ‘Taking a top-down approach already implies a categorisation attempt that is outside of the sphere of influence of the wiki contributors, which kind of counteracts the point of a wiki.’
    • ‘Dark energy is a mysterious pressure that counteracts gravity, forcing the universe to expand faster than it otherwise would.’
    • ‘High-intensity resistance exercise training counteracts muscle weakness and physical frailty in very elderly people.’
    • ‘Coffee counteracts the effects of a head cold to help you function normally.’
    • ‘Inverters can reduce overall crosstalk by counteracting the effects of switching, as long as the victim trace runs alongside both the native signal and its inverted form.’
    • ‘The precise method by which Aloe Vera works is not yet fully understood, but it is a great stimulator of the body's own system, which counteracts disease and disorder.’
    • ‘There must, therefore, be some hidden advantage to being left-handed that counteracts the risks, but the problem for biologists was trying to work out what this advantage was.’
    • ‘Organic matter neutralises or counteracts many disinfectants.’
    • ‘Finally, it has been suggested that a pH shift could serve as a signal to induce systems to counteract imbalances.’
    • ‘Allegedly there's no virus checking software designed to counteract it yet, but there could be a cure by the end of today.’
    • ‘Some force in the universe not only counteracts gravity but pushes the galaxies in the universe apart ever faster.’
    • ‘Dynamic Drive is another option, fitted to the car we drove; it counteracts body lean to force the BMW level in corners.’
    • ‘He didn't, therefore, possess adrenaline - the life-saving drug which counteracts the allergic reaction people have when sensitive to bee and wasp stings.’
    prevent, thwart, frustrate, foil, impede, curb, restrain, forestall, hinder, hamper, baulk, oppose, act against, stall, check, resist, withstand, defeat, put a stop to, bring an end to
    offset, counterbalance, balance, balance out, cancel out, even out, counterpoise, countervail, compensate for, make up for, remedy
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