abstruse, acroamatic, acroamatical, arcane, arcanus, clandestine, close, concealed, confidential, covert, cryptic, dark, esoteric, furtive, hidden, latent, mysterious, not public, obscure, occult, occultus, private, privy, recondite, secluded, secretus, shrouded, sly, surreptitious, undisclosed, undivulged, unknown, unpublished, unrevealed, unseen, untold, veiled
associated concepts: secret lien, undisclosed principal
abstruse knowledge, arcana, cabal, classified information, concealed knowledge, confidence, confidential communication, confidential matter, enigma, hidden knowledge, inside information, intimacy, intrigue, mystery, obscure information, personal matter, private affair, private communication, private matter, privileged communication, privileged information, puzzle, recondite knowledge, res arcana, res occulta, unknown information, veiled information
anonymous, clandestine, confidence (relation of trust), confidential, covert, enigma, enigmatic, esoteric, furtive, hidden, inscrutable, interior, intimate, mysterious, mystery, personal (private), private (confidential), privy, recondite, seal (close), sequester (seclude), sly, stealthy, surreptitious, ulterior, uncanny, undisclosed
Burton's Legal Thesaurus. William C. Burton. 2006
adj.Not known by others; hidden from view or concealed.n.secret
The Essential Law Dictionary. — Sphinx Publishing, An imprint of Sourcebooks, Inc. Amy Hackney Blackwell. 2008.