Impair
Impair verb - To reduce the soundness, effectiveness, or perfection of.
Nearby Words: impairment, impairing
Strengthen
Strengthen verb - To increase the ability of (as a muscle) to exert physical force.
Usage example: the army makes new recruits run for miles in order to strengthen them
Impair is an antonym for strengthen.
Nearby Words: strength, strengthening
Common collocations
Cite this Source
Strengthen and Impair. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/impair/strengthen
Impair & Strengthen. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/impair/strengthen>.
Strengthen or Impair. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/impair/strengthen.
Google Ngram Viewer shows how "impair" and "strengthen" have occurred on timeline