adj.

Known or understood by only a few: arcane economic theories. See synonyms at mysterious.

[Latin arcānus, secret, from arca, chest.]

adjective

Difficult to explain or understand: cabalistic, cryptic, enigmatic, mysterious, mystic, mystical, mystifying, occult, puzzling. See explain/baffle, knowledge/ignorance.

adj

Definition: hidden, secret
Antonyms: common, commonplace, known, normal, outward

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That which is hidden or secret; usually refers to rites associated with the mystery religions or secret societies.

Sources:

Yarker, John. The Arcane Schools. Belfast, 1909.

Dansk (Danish)
adj. - mystisk, esoterisk

Nederlands (Dutch)
geheim(zinnig), esoterisch

Français (French)
adj. - secret, mystérieux, ésotérique

Deutsch (German)
adj. - geheimnisvoll

Ελληνική (Greek)
adj. - απόκρυφος, μυστηριακός, δυσνόητος, αινιγματικός

Italiano (Italian)
arcano

Português (Portuguese)
adj. - arcano, enigmático

Русский (Russian)
тайный, скрытый

Español (Spanish)
adj. - arcano, secreto, misterioso

Svenska (Swedish)
adj. - hemlig, svårbegriplig

中文（简体） (Chinese (Simplified))
神秘的, 不可思议的

中文（繁體） (Chinese (Traditional))
adj. - 神秘的, 不可思議的

한국어 (Korean)
adj. - 비밀의

日本語 (Japanese)
adj. - 秘密の, 不可解な

العربيه (Arabic)
‏(صفه) سري‏

עברית (Hebrew)
adj. - ‮סודי, מסתורי, מובן רק למעטים‬

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