EFFICACY

/ˈɛf.ɪ.kə.si/ Scrabble 21 Words With Friends 22

Scrabble letter values: E₁F₄F₄I₁C₃A₁C₃Y₄ = 21

Definition

noun capacity or power to produce a desired effect. — synonyms: efficaciousness

Examples

“concern about the safety and efficacy of the vaccine”

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