Abstruse
Abstruse adjective - Difficult for one of ordinary knowledge or intelligence to understand.
Usage example: you're not the only one who finds Einstein's theory of relativity abstruse
Arcane is a synonym for abstruse in obscure topic. In some cases you can use "Arcane" instead an adjective "Abstruse".
Nearby Word: abstrusity
Arcane
Arcane adjective - Difficult for one of ordinary knowledge or intelligence to understand.
Usage example: grammatical rules that seem arcane to generations of students who were never taught grammar in the first place
Mutual synonyms
Related pairs
Cite this Source
Arcane and Abstruse. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/abstruse/arcane
Abstruse & Arcane. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/abstruse/arcane>.
Arcane or Abstruse. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/abstruse/arcane.
Google Ngram Viewer shows how "abstruse" and "arcane" have occurred on timeline