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Adjective
- 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
- 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