Efficient and Uneffective

Opposite meaning words

Efficient adjective - Being effective without wasting time or effort or expense.

Usage example: efficient engines save gas

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Uneffective is an antonym for efficient.

Nearby Words: efficiency, efficiently, efficacy

Uneffective adjective - Not producing an intended effect.

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Efficient is an antonym for uneffective.

Cite this Source

Uneffective and Efficient. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/efficient/uneffective

Efficient & Uneffective. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/efficient/uneffective>.

Uneffective or Efficient. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/efficient/uneffective.

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