September 18, 2026

Inefficacy

noun

Definition

Inability to produce a desired effect; lack of effectiveness. It refers to the failure of a method, drug, or plan to achieve its intended goal.

Example Sentence

“The inefficacy of the old treatments led researchers to explore entirely new approaches.”

Etymology

From Latin inefficacia, from in- (not) + efficacia (effectiveness), from efficere (to accomplish).

Scrabble Score

I1N1E1F4F4I1C3A1C3Y4

INEFFICACY scores 23 points in Scrabble.

Synonyms & Related Words

ineffectiveness futility uselessness impotence

Use It in Word Games

Find words from INEFFICACY Anagram: Inefficacy Wordle Solver