Invalid and Unanswerable
Opposite meaning words
Invalid
Invalid adjective - Chronically or repeatedly suffering from poor health.
Unanswerable is an antonym for invalid.
Unanswerable
Cite this Source
Unanswerable and Invalid. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/invalid/unanswerable
Invalid & Unanswerable. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/invalid/unanswerable>.
Unanswerable or Invalid. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/invalid/unanswerable.
Google Ngram Viewer shows how "invalid" and "unanswerable" have occurred on timeline