Sinister
Sinister adjective - Being or showing a sign of evil or calamity to come.
Usage example: the movie relies too much on sinister background music to create the suspense that the plot sorely lacks
Cite this Source
Sunless and Sinister. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/sinister/sunless
Sinister & Sunless. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/sinister/sunless>.
Sunless or Sinister. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/sinister/sunless.
Google Ngram Viewer shows how "sinister" and "sunless" have occurred on timeline