Deficient and Indefectible

Opposite meaning words

Deficient adjective - Lacking some necessary part.

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Indefectible is an antonym for deficient.

Nearby Words: deficiency, deficit, deficiently

Indefectible adjective - Being entirely without fault or flaw.

Usage example: the indefectible logic of the polemist's arguments

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Deficient is an antonym for indefectible.

Cite this Source

Indefectible and Deficient. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/deficient/indefectible

Deficient & Indefectible. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/deficient/indefectible>.

Indefectible or Deficient. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/deficient/indefectible.

Google Ngram Viewer shows how "deficient" and "indefectible" have occurred on timeline