Sleepless and Unvigilant
Opposite meaning words
Sleepless
Unvigilant
Unvigilant adjective - Not alert to what is potentially dangerous.
Sleepless is an antonym for unvigilant.
Cite this Source
Unvigilant and Sleepless. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/sleepless/unvigilant
Sleepless & Unvigilant. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/sleepless/unvigilant>.
Unvigilant or Sleepless. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/sleepless/unvigilant.
Google Ngram Viewer shows how "sleepless" and "unvigilant" have occurred on timeline