clandestine

clandestine adjective arcane, behind the scenes, camouflaged, clandestinus, cloaked, collusive, concealed, confidential, covert, cunning, disguised, evasive, furtive, furtivus, hidden, in the backkround, irrevealable, masked, obscure, screened, secluded, secret, secretive, shrouded, sneaking, stealthy, stifled, suppressed, surreptitious, undercover, underhand, underhanded, undisclosed, unknown, unrevealed, unseen, veiled, with secret design
Associated concepts: clandestine adultery, clandestine immortation, clandestine marriage, clandestine meeting

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See also: allusive, collusive, confidential, covert, evasive, furtive, hidden, mysterious, personal, private, privy, secret, sly, stealthy, surreptitious, unobtrusive

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CLANDESTINE. That which is done in secret and contrary to law.
     2.Generally a clandestine act in case of the limitation of actions will prevent the act from running. A clandestine marriage is one which has been contracted without the form which the law has prescribed for this important contract. Alis. Princ. 543