LanGeekLanGeek Dictionary

Efficacy

British pronunciation/ˈɛfɪkəsi/
American pronunciation/ˈɛfɪˌkæsi/
Efficacy
[NOUN]
1

the power to bring about planned or wanted results

synonyms : efficaciousness
antonyms : inefficacy
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Examples
1Efficacy matters.
2We have to improve efficacy.
3Might more mean efficacy for a longer period of time?
4However, against the Delta variant the efficacy dropped.
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