Efficacity and Ineffectualness

Opposite meaning words

Efficacity noun - The power to produce a desired result.

Usage example: the limited efficacity of the primitive tool as an instrument for cutting raw meat

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Ineffectualness is an antonym for efficacity.

Ineffectualness noun - Lacking the power to be effective.

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Efficacity is an antonym for ineffectualness.

Cite this Source

Ineffectualness and Efficacity. (2017). Retrieved 2026, July 22, from https://thesaurus.plus/related/efficacity/ineffectualness

Efficacity & Ineffectualness. N.p., 2017. Web. 22 Jul. 2026. <https://thesaurus.plus/related/efficacity/ineffectualness>.

Ineffectualness or Efficacity. 2017. Accessed July 22, 2026. https://thesaurus.plus/related/efficacity/ineffectualness.

Google Ngram Viewer shows how "efficacity" and "ineffectualness" have occurred on timeline