December 16, 2026

Inefficacious

adjective

Definition

Not producing the desired effect; ineffective. An inefficacious remedy is one that fails to cure or alleviate a condition.

Example Sentence

“The old medicine proved inefficacious against the new strain of the virus.”

Etymology

From Latin inefficax, from in- (not) + efficax (effective), from efficere (to accomplish).

Scrabble Score

I1N1E1F4F4I1C3A1C3I1O1U1S1

INEFFICACIOUS scores 23 points in Scrabble.

Synonyms & Related Words

ineffective useless futile powerless

Use It in Word Games

Find words from INEFFICACIOUS Anagram: Inefficacious Wordle Solver