How to pronounce efficacious

Adjective

• producing or capable of producing an intended result or having a striking effect; -LewisMumford

  “an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation”

  “effective teaching methods”

  “effective steps toward peace”

  “made an effective entrance”

  “his complaint proved to be effectual in bringing action”

  “an efficacious law”

  Synonyms: effective

  Antonyms: ineffective

• marked by qualities giving the power to produce an intended effect; -Aldous Huxley

  “written propaganda is less efficacious than the habits and prejudices...of the readers”

  “the medicine is efficacious in stopping a cough”