Esoteric
Esoteric adjective - Difficult for one of ordinary knowledge or intelligence to understand.
Heavy and esoteric are semantically related in easy topic. In some cases you can use "Heavy" instead an adjective "Esoteric", when it comes to topics like mysterious.
Cite this Source
Heavy and Esoteric. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/esoteric/heavy
Esoteric & Heavy. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/esoteric/heavy>.
Heavy or Esoteric. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/esoteric/heavy.
Google Ngram Viewer shows how "esoteric" and "heavy" have occurred on timeline