Acceptable and Deficient
Opposite meaning words
Acceptable
Acceptable adjective - Of a level of quality that meets one's needs or standards.
Usage example: told the bike rental man that a ten-speed with four broken gears was not acceptable
Deficient is an antonym for acceptable.
Deficient
Deficient adjective - Falling short of a standard.
Usage example: woefully deficient eyesight kept him out of military service
Acceptable is an antonym for deficient.
Cite this Source
Deficient and Acceptable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/acceptable/deficient
Acceptable & Deficient. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/acceptable/deficient>.
Deficient or Acceptable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/acceptable/deficient.
Google Ngram Viewer shows how "acceptable" and "deficient" have occurred on timeline