Efficacious and Idle

Opposite meaning words

Efficacious adjective - Producing or capable of producing a desired result.

Usage example: taking a cookie break while studying is one of the most efficacious ways of rejuvenating the mind that I have ever discovered

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Idle is an antonym for efficacious.

Idle adjective - Not being in a state of use, activity, or employment.

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Efficacious is an antonym for idle.

Nearby Words: idled, idleness, idler, idling, idly

Cite this Source

Idle and Efficacious. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/efficacious/idle

Efficacious & Idle. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/efficacious/idle>.

Idle or Efficacious. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/efficacious/idle.

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