Antonym.com
NEW
Table of Contents
1. efficacy
Table of Contents
1. efficacy
Antonyms
Synonyms
Etymology
1. efficacy
noun.
['ˈɛfɪˌkæsi']
capacity
or
power
to
produce
a
desired
effect.
Antonyms
inefficacy
efficacious
ineffectiveness
inefficacious
powerlessness
effective
ineffective
Synonyms
effectivity
efficacious
inefficacious
effectiveness
effectuality
Etymology
efficacy (English)
efficacia (Latin)
Antonym.com