surreptitious
I
adjective
artful, clandestine, clandestinus, concealed, conniving, covert, crafty, cunning, deceitful, deceptive, delitescent, disguised, done by stealth, evasive, faked, fraudulently introduced, furtive, furtivus, guileful, hidden, indirect, insidious, lurking, mysterious, obreptitious, private, secret, secretive, sneaky, stealthy, subdolous, subtle, tricky, uncommunicative, undercover, underground, underhand, undisclosed, unknown, unseen, unspied, unsuspected, veiled, vulpine, wily
II
index
clandestine, collusive, covert, dishonest, disingenuous, evasive, fraudulent, furtive, hidden, insidious, mysterious, privy, secret, sly, stealthy, unobtrusive
Burton's Legal Thesaurus.
William C. Burton.
2006