Effective and Uneffective

Effective

Effective adjective - Producing or capable of producing an intended result or having a striking effect.
Usage example: effective steps toward peace

Uneffective is an antonym for effective.

Uneffective

Uneffective adjective - Not producing an intended effect.

Effective is an antonym for uneffective.
Cite this Source
Uneffective and Effective. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/effective/uneffective
Effective & Uneffective. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/effective/uneffective>.
Uneffective or Effective. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/effective/uneffective.
Google Ngram Viewer shows how "effective" and "uneffective" have occurred on timeline