Unsound
Unsound adjective - Having or showing a very abnormal or sick state of mind.
Usage example: disgruntled relatives tried to prove that the woman was of unsound mind when she made her will
Witless and unsound are semantically related. In some cases you can use "Witless" instead an adjective "Unsound".
Witless
Witless adjective - Showing or marked by a lack of good sense or judgment.
Usage example: a witless decision to relocate to the other side of the country without even the prospect of a job
Cite this Source
Witless and Unsound. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/unsound/witless
Unsound & Witless. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/unsound/witless>.
Witless or Unsound. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/unsound/witless.
Google Ngram Viewer shows how "unsound" and "witless" have occurred on timeline