adj.
written propaganda is less efficacious than the habits and prejudices...of the readers"-Aldous Huxley; "the medicine is efficacious in stopping a cough
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
