inefficacious

1. 1.

   lacking the power to produce a desired effect

   “laws that are inefficacious in stopping crime”

   Antonymsefficacious

Questions about inefficacious

What does inefficacious mean?

inefficacious means "lacking the power to produce a desired effect".

How many syllables are in inefficacious?

inefficacious has 6 syllables: i-nef-fi-ca-ci-ous. The stress falls on "ci".

What is the opposite of inefficacious?

The recorded antonyms are efficacious.

Is inefficacious a common word?

inefficacious is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.