efficacious
[ef-i-key-shuh s]
adjective
capable of having the desired result or effect; effective as a means, measure, remedy, etc.: The medicine is efficacious in stopping a cough.
RELATED WORDS
effectual, effective, active, adequate, capable, competent, energetic, influential, operative, potent, powerful, serviceable, strong, successful, useful, virtuous, puissant
Origin of efficacious
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for efficacious
Contemporary Examples of efficacious
I asked him if he thought cattle cars would be an efficacious means of transporting the Palestinians to their new homes.
Historical Examples of efficacious
And some of the most efficacious burrowers have been their own spiritual children.
A Writer's Recollections (In Two Volumes), Volume IMrs. Humphry Ward
Everyday influences, even the smallest and most dissimulated, are often the most efficacious.
The Sexual QuestionAugust Forel
Relics have served as efficacious instruments to accomplish that end.
Roman Catholicism in SpainAnonymous
Whatever the brew might be worth, the whisky certainly was efficacious.
The Heart of Thunder MountainEdfrid A. Bingham
Efficacious as this mode of execution may seem, it was neither speedy nor merciful.
Fox's Book of MartyrsJohn Foxe
efficacious
adjective
Word Origin for efficacious
C16: from Latin efficāx powerful, efficient, from efficere to achieve; see effect
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