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English - English (Wordnet) dictionary (also found in English - Vietnamese, )
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  • producing or capable of producing an intended result or having a striking effect
    • an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation-LewisMumford
    • effective teaching methods
    • effective steps toward peace
    • made an effective entrance
    • his complaint proved to be effectual in bringing action
    • an efficacious law
  • marked by qualities giving the power to produce an intended effect
    • written propaganda is less efficacious than the habits and prejudices...of the readers-Aldous Huxley
    • the medicine is efficacious in stopping a cough
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