Definition of ARCANE

difficult for one of ordinary knowledge or intelligence to understand <grammatical rules that seem arcane to generations of students who were never taught grammar in the first place>
Synonyms abstruse, arcane, deep, esoteric, hermetic (also hermetical), recondite
having an often intentionally veiled or uncertain meaning <the rebate form uses arcane language, the only purpose of which seems to be to disqualify buyers from actually getting a rebate>

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