Inefficacious and Practical

Opposite meaning words

Inefficacious adjective - Producing no results.

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

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Practical is an antonym for inefficacious.

Practical adjective - Capable of being put to use or account.

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Inefficacious is an antonym for practical.

Cite this Source

Practical and Inefficacious. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/inefficacious/practical

Inefficacious & Practical. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/inefficacious/practical>.

Practical or Inefficacious. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/inefficacious/practical.

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