Meaning of ARCANE in English

ARCANE

/ ɑːˈkeɪn; NAmE ɑːrˈk-/ adjective

( formal ) secret and mysterious and therefore difficult to understand

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WORD ORIGIN

mid 16th cent.: from Latin arcanus , from arcere to shut up, from arca chest.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.