not open or public; kept private or not revealed; "a secret formula"; "secret ingredients"; "secret talks"
7
cryptic
of an obscure nature; "the new insurance policy is written without cryptic or mysterious terms"; "a deep dark secret"; "the inscrutible workings of Providence"; "in its mysterious past it encompasses all the dim origins of life"- Rachel Carson; "rituals t
1
hidden
difficult to find; "hidden valleys"; "a hidden cave"; "an obscure retreat"
