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efficacious adjective
Meaning : 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.
Lacking the power to produce a desired effect.
Laws that are inefficacious in stopping crime.inefficacious
Meaning : 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.
Synonyms : effective, effectual
Not producing an intended effect.
An ineffective teacher.Ineffective legislation.
ineffective, ineffectual, uneffective
