Efficacious and Incapable

Efficacious

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

Incapable is an antonym for efficacious in efficient topic.

Incapable

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

Efficacious is an antonym for incapable.

Nearby Word: incapability
Cite this Source
Incapable and Efficacious. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/efficacious/incapable
Efficacious & Incapable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/efficacious/incapable>.
Incapable or Efficacious. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/efficacious/incapable.
Google Ngram Viewer shows how "efficacious" and "incapable" have occurred on timeline