Inefficient and Operant

Opposite meaning words

Inefficient adjective - Not producing the desired result.

Usage example: inefficient measures to solve the problem of teenage smoking

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Operant is an antonym for inefficient.

Operant adjective - Having influence or producing an effect.

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Inefficient is an antonym for operant.

Cite this Source

Operant and Inefficient. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/inefficient/operant

Inefficient & Operant. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/inefficient/operant>.

Operant or Inefficient. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/inefficient/operant.

Google Ngram Viewer shows how "inefficient" and "operant" have occurred on timeline