arcane
Pronunciation:
/ɑɹˈkeɪn/adjective
Definitions
Understood by only a few.
Example: arcane rituals
Synonyms:esotericAntonyms:mundane(by extension) Obscure, mysterious.
Example: arcane details
Synonyms:clandestineenigmaticesotericreconditeRequiring secret or mysterious knowledge to understand.
Extremely old (e.g. interpretation or knowledge), and possibly irrelevant.
Example: An arcane law