Invalid
Invalid adjective - Chronically or repeatedly suffering from poor health.
Usage example: an old and now invalid woman who rarely gets out anymore
Poorly and invalid are semantically related. in sickly topic. In some cases you can use "Poorly" instead an adjective "Invalid", when it comes to topics like disabled.
Mutual synonyms
Cite this Source
Poorly and Invalid. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/invalid/poorly
Invalid & Poorly. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/invalid/poorly>.
Poorly or Invalid. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/invalid/poorly.
Google Ngram Viewer shows how "invalid" and "poorly" have occurred on timeline