efficacy

Definitions

The ability to produce a desired or intended result.

The power or capacity to produce an effect.

Examples

The medical team is currently testing the efficacy of the new vaccine in clinical trials.

Many people question the efficacy of these herbal supplements in treating chronic pain.

The manager doubted the efficacy of the new marketing strategy after seeing the low conversion rates.

Synonyms

effectiveness potency efficiency power capability competence success

Antonyms

ineffectiveness incompetence inefficiency failure impotence uselessness inutility