clandestine
1.
(
satellite adjective
) conducted with or marked by hidden aims or methods; "clandestine intelligence operations"; "cloak-and-dagger activities behind enemy lines"; "hole-and-corner intrigue"; "secret missions"; "a secret agent"; "secret sales of arms"; "surreptitious mobilization of troops"; "an undercover investigation"; "underground resistance"
Synonyms:
cloak-and-dagger
,
hole-and-corner
,
hugger-mugger
,
hush-hush
,
on the quiet
,
secret
,
surreptitious
,
undercover
,
underground
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