efficacy

noun
/ˈɛfɪkəsi/

Meaning

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

Example Sentences

The efficacy of the new policy is still being evaluated.

The efficacy of the vaccine has been proven in trials.

The efficacy of the new vaccine has been proven.

Synonyms

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

Antonyms

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

Collocations

efficacy of treatment, clinical efficacy, prove efficacy, high efficacy

Related Vocabularies

a small truck with an open back; the act of collecting or improving something
An act or process of merging.
The degree to which a substance can be absorbed and used by the body.
the outer layer of the body
a woman who works in business, especially one who owns or manages a company
a state ruled by a prince

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