efficacy
[ ef-i-kuh-see ]
/ ˈɛf ɪ kə si /
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noun, plural ef·fi·ca·cies.
capacity for producing a desired result or effect; effectiveness: a remedy of great efficacy.
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QUIZ YOURSELF ON AFFECT VS. EFFECT!
In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.
Sometimes ef·fi·cac·i·ty [ef-i-kas-i-tee] /ˌɛf ɪˈkæs ɪ ti/ .
Origin of efficacy
First recorded in 1520–30; from Latin efficācia, equivalent to efficāc- “effective, effectual” + -ia noun suffix; see efficacious, -y3
OTHER WORDS FROM efficacy
non·ef·fi·ca·cy, nounDictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for efficacy
That these two are different will easily be clear to anyone who passes in review their respective efficacies.
The Consolation of Philosophy|BoethiusIn silence and secrecy thought has been working, and the benignant efficacies of concealment speak for themselves.
Ku Klux Klan|J. C. Lester
British Dictionary definitions for efficacy
efficacy
/ (ˈɛfɪkəsɪ) /
noun
the quality of being successful in producing an intended result; effectiveness
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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