arcane
/ɑɹˈkeɪn/
/ɑɹˈkeɪn/
adjective
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Understood by only a few.
"arcane rituals"
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(by extension) Obscure, mysterious.
"arcane details"
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Requiring secret or mysterious knowledge to understand.
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Extremely old (e.g. interpretation or knowledge), and possibly irrelevant.
"An arcane law"
Synonyms:
clandestine, enigmatic, esoteric, recondite, esoteric
Antonyms:
mundane