inefficacy


in·ef·fi·ca·cy

noun \(ˌ)i-ˈne-fi-kə-sē\

Definition of INEFFICACY

:  lack of power to produce a desired effect

Origin of INEFFICACY

Late Latin inefficacia, from Latin inefficac-, inefficax inefficacious, from in- + efficac-, efficax efficacious
First Known Use: circa 1615

Browse

Next Word in the Dictionary: inefficiency
Previous Word in the Dictionary: inefficacity
All Words Near: inefficacy

Seen & Heard

What made you want to look up inefficacy? Please tell us where you read or heard it (including the quote, if possible).