Efficacious and Incompetent

Opposite meaning words

Efficacious adjective - Producing or capable of producing a desired result.

Usage example: taking a cookie break while studying is one of the most efficacious ways of rejuvenating the mind that I have ever discovered

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Incompetent is an antonym for efficacious.

Incompetent adjective - Lacking qualities (as knowledge, skill, or ability) required to do a job.

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Efficacious is an antonym for incompetent.

Cite this Source

Incompetent and Efficacious. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/efficacious/incompetent

Efficacious & Incompetent. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/efficacious/incompetent>.

Incompetent or Efficacious. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/efficacious/incompetent.

Google Ngram Viewer shows how "efficacious" and "incompetent" have occurred on timeline