Similarly, clandestine foreign operations have sullied the civilian courts.
Much has already been written about the recklessness inherent in any director of the CIA entering into a clandestine relationship.
The government sought to prove the existence of a plot through a campaign of undercover surveillance and clandestine recordings.
1560s, from Latin clandestinus "secret, hidden," from clam "secretly," from adverbial derivative of base of celare "to hide" (see cell), perhaps on model of intestinus "internal." Related: Clandestinely. As a noun form, there is awkward clandestinity (clandestineness apparently being a dictionary word).