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secret, unavowed | not openly made known | ||
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secret | indulging only covertly | ||
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secret, confidential | (of information) given in confidence or in secret | ||
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secret | something that should remain hidden from others (especially information that is not to be passed on) | ||
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secret | a method or solution that is known only to a few, undisclosed to the masses | ||
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secret | communicated covertly | ||
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secluded, secret, privy | hidden from general view or use | ||
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secret | not open or public; kept private or not revealed | ||
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mystery, enigma, secret, closed book | something that baffles understanding and cannot be explained | ||
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secret, hidden | designed to elude detection | ||
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secret | the next to highest level of official classification for documents | ||
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secret, private | not expressed | ||
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mysterious, mystic, secret, mystical, occult, orphic | having an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding | ||
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secret, arcanum | information known only to a special group | ||
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secret, clandestine, undercover, cloak-and-dagger, hole-and-corner, hugger-mugger, hush-hush, surreptitious, underground | conducted with or marked by hidden aims or methods |