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English to English adjective
| 1 |
marked by qualities giving the power to produce an intended effect |  | Example: written propaganda is less efficacious than the habits and prejudices...of the readers
the medicine is efficacious in stopping a cough
source: wordnet30
| 2 |
producing or capable of producing an intended result or having a striking effect | | Example: 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
source: wordnet30
| 3 |
Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law. | | source: webster1913
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