efficacious

Words with a similar base: efficacious

'efficacious'

[efficacious.a.01] as in: marked by qualities giving the power to produce an intended effect; -Aldous Huxley

Examples:
written propaganda is less efficacious than the habits and prejudices...of

the readers
the medicine is efficacious in stopping a cough

'efficacious'

[effective.a.01] as in: producing or capable of producing an intended result or having a striking effect; -LewisMumford

Examples:
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

Origins

					efficacious (English)
└── efficacieux (Old French (842-ca. 1400))
    └── efficax (Latin)

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