efficacy
pronunciation
How to pronounce efficacy in British English:
UK [ˈefɪkəsi]
How to pronounce efficacy in American English:
US [ˈefɪkəsi]
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- Noun:
- capacity or power to produce a desired effect
Word Origin
- efficacy (n.)
- 1520s, from Latin efficacia "efficacy, efficiency," from efficax (genitive efficacis) "powerful, effectual, efficient," from stem of efficere "work out, accomplish" (see effect (n.)). Earlier in same sense was efficace (c. 1200), from Old French eficace (14c.), from Latin efficacia; also efficacite (early 15c.), from Latin efficacitatem.
Synonym
Example
- 1. There are limits to the efficacy of the food safety simulator .
- 2. They also say this argument should not be just about short-term efficacy , but morality as well .
- 3. But policies that have delivered in the past are losing their efficacy .
- 4. Properly operating lagoons have also been studied for efficacy .
- 5. Yet some freudians worry about the efficacy of short-term , long-distance programs .