inefficacy

Plural: inefficacies

Noun

a lack of efficacy
The condition of being ineffective

Origin / Etymology

From in- + efficacy.

Synonyms

inefficaciousness

Antonyms

efficacy

Scrabble Score: 23

inefficacy is a valid Scrabble (US) TWL word
inefficacy is a valid Scrabble Word in Merriam-Webster MW Dictionary
inefficacy is a valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 25

inefficacy is a valid Words With Friends word