Deficient and Regrettable

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Deficient adjective - Lacking some necessary part.

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Regrettable and deficient are semantically related. In some cases you can use "Regrettable" instead an adjective "Deficient".

Nearby Words: deficiency, deficit, deficiently

Regrettable adjective - Of a kind to cause great distress.

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Deficient and regrettable are semantically related. Sometimes you can use "Deficient" instead an adjective "Regrettable".

Cite this Source

Regrettable and Deficient. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deficient/regrettable

Deficient & Regrettable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deficient/regrettable>.

Regrettable or Deficient. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deficient/regrettable.

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