Inefficacious and Workable

Opposite meaning words

Inefficacious adjective - Producing no results.

Usage example: an inefficacious medication for a rare form of tuberculosis

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Workable is an antonym for inefficacious.

Workable adjective - Capable of being done or carried out.

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Inefficacious is an antonym for workable.

Nearby Words: work, working, worked, workability

Cite this Source

Workable and Inefficacious. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/inefficacious/workable

Inefficacious & Workable. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/inefficacious/workable>.

Workable or Inefficacious. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/inefficacious/workable.

Google Ngram Viewer shows how "inefficacious" and "workable" have occurred on timeline