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Meaning & History
Meaning "Something secret or unexplainable; an unknown", "Someone or something with an obscure or puzzling nature". From Middle English mysterie, from Anglo-Norman misterie, from Old French mistere, from Latin mysterium, from Ancient Greek μυστήριον (mustḗrion, "a mystery, a secret, a secret rite"), from μύστης (mústēs, "initiated one"), from μυέω (muéō, "I initiate"), from μύω (múō, "I shut").