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efficacy

noun
/ˈɛf.ɪ.kə.si/

Meaning

The ability to produce a desired or intended result; effectiveness.
The ability to produce a desired or intended result.

Example Sentences

The efficacy of the vaccine has been proven in trials.

The efficacy of the new vaccine has been proven.

The efficacy of the vaccine has been proven in trials.

Synonyms

effectiveness, efficiency, success, potency
Entry 1
effectiveness, efficiency, success
Entry 2
effectiveness, potency
Entry 3
effectiveness, efficiency, success

Antonyms

inefficacy, failure, uselessness, ineffectiveness
Entry 1
inefficacy, failure, uselessness
Entry 2
ineffectiveness, failure
Entry 3
inefficacy, failure, uselessness

Related Vocabularies

Something spreading or growing rapidly and extensively.
a very strong sexual desire or an intense craving for something
the act of giving or doing something to help achieve a result
The act of proving a statement or argument to be false or incorrect.
A senior clergyman in the Christian Church ranking below a bishop.
an action performed or a feeling experienced in response to a situation or event

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