Unsufficient
Weakening and unsufficient are semantically related. In some cases you can use "Weakening" instead an adjective "Unsufficient".
Weakening
Weakening adjective - Causing debilitation.
Unsufficient and weakening are semantically related. Sometimes you can use "Unsufficient" instead an adjective "Weakening".
Cite this Source
Weakening and Unsufficient. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/unsufficient/weakening
Unsufficient & Weakening. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/unsufficient/weakening>.
Weakening or Unsufficient. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/unsufficient/weakening.
Google Ngram Viewer shows how "unsufficient" and "weakening" have occurred on timeline