Inefficient and Ultraefficient

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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Ultraefficient is an antonym for inefficient.

Definitions of Inefficient not found.

Inefficient is an antonym for ultraefficient.

Cite this Source

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

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

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

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