efficacy (B2)

noun

Pronunciation: /ˈɛfɪkəsi/

Definition

The ability to produce a desired or intended result.

Examples

• The efficacy of the training program was evident in the improved performance of the employees.

• Scientists are testing the efficacy of the new vaccine against the virus.

• We need to measure the efficacy of our marketing strategy before investing more money.

Synonyms of efficacy

Words with a similar meaning to efficacy:

• effectiveness
• potency
• capability
• power

Antonyms of efficacy

Words with the opposite meaning to efficacy:

• ineffectiveness
• futility

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