English / word
efficacy
noun C1MEANING IN ENGLISH
the ability to produce a desired or intended result; effectiveness
In context
01
The efficacy of the new policy is still being evaluated.
02
The efficacy of the vaccine has been proven in trials.
Synonyms
effectiveness,power,efficiency
Antonyms
failure,weakness,inefficacy
Collocations
efficacy of treatment,clinical efficacy,prove efficacy