Exact Match:
- clandestine
- 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:
- back-door,
- backstairs,
- covert,
- feline,
- furtive,
- hidlings,
- hole-and-corner,
- hugger-mugger,
- privy,
- quiet,
- shifty,
- skulking,
- slinking,
- slinky,
- sly,
- sneaking,
- sneaky,
- stealthy,
- surreptitious,
- under-the-counter,
- under-the-table,
- undercover,
- underground,
- underhand,
- underhanded,
- unobtrusive