Infirm and Undoubtful
Opposite meaning words
Infirm
Infirm adjective - Lacking bodily strength.
Undoubtful is an antonym for infirm.
Nearby Word: infirmity
Undoubtful
Cite this Source
Undoubtful and Infirm. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/infirm/undoubtful
Infirm & Undoubtful. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/infirm/undoubtful>.
Undoubtful or Infirm. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/infirm/undoubtful.
Google Ngram Viewer shows how "infirm" and "undoubtful" have occurred on timeline