Word Games Pro Dictionary

efficacy

noun

capacity or power to produce a desired effect

Quick reference

Word Facts

Word length
8
Starts with
E
Ends with
Y
Contains
FF
Scrabble score
21
Database source
OEWN 2025 Core

How it sounds

Pronunciation

ˈɛf.ɪ.kə.si

Meaning

Definitions

noun

  1. capacity or power to produce a desired effect

    “concern about the safety and efficacy of the vaccine”

In context

Example Sentences

concern about the safety and efficacy of the vaccine

Similar words

Synonyms

Opposite words

Antonyms

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