Efficient and Unable

Opposite meaning words

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

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Unable is an antonym for efficient in adept topic.

Nearby Words: efficiency, efficiently, efficacy

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

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Efficient is an antonym for unable.

Cite this Source

Unable and Efficient. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/efficient/unable

Efficient & Unable. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/efficient/unable>.

Unable or Efficient. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/efficient/unable.

Google Ngram Viewer shows how "efficient" and "unable" have occurred on timeline