• (noun) IPA: /ˈkaʊntəɹˌækt/
  • (verb) IPA: /ˌkaʊntəɹˈækt/

counteract (plural counteracts)

  1. An action performed in opposition to another action.

counteract (counteracts, present participle counteracting; past and past participle counteracted)

  1. To have a contrary or opposing effect or force on
    • 1796, Erasmus Darwin, Zoonomia, or, the Laws of Organic Life
      Another tide is raised at the same time on the opposite side of the revolving earth; which is owing to the greater centrifugal motion of that side of the earth, which counteracts the gravitation of bodies near its surface.
    • 1911, 1911 Encyclopædia Britannica - Dome ↗
      In India, in the “great mosque” of Jama Masjid (a.d. 1560) and the Gol Gumbaz, or tomb of Mahommed Adil Shah (a.d. 1630) at Bijapur, the domes are carried on pendentives consisting of arches crossing one another and projecting inwards, and their weight counteracts any thrust there may be in the dome.
  2. To deliberately act in opposition to, to thwart or frustrate
    • 2016, Margaret Corvid writing in the New Statesman, Five practical things you can do to fight Donald Trump if you live in the UK ↗
      When people hear my American accent, they want to talk to me about Donald Trump. They want to ask me what happened, and why. But most of all, they ask me – with fear filling their voices – what they can do, as individuals, to counteract him, here, from the United Kingdom.
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