clandestine

Adjective Satellite

• conducted with or marked by hidden aims or methods
  • "clandestine intelligence operations"

Adj

• Done or kept in secret, sometimes to conceal an illicit or improper purpose.
• Not recognized as a regular member.

Examples

• clandestine military operations

Synonyms

cloak-and-dagger, hole-and-corner, hugger-mugger, hush-hush, secret, surreptitious, undercover, underground, abstruse, behind the scenes, catlike, clandestine, concealed, confidential, covert, deep-laid, dern, disguised, furtive, huggermugger, incognito, inconspicuous, low profile, lurksome, lurky, mousy, obfuscated, off-the-books, on the down-low, on the sly, secretive, slinky, sly, sneaky, stealthy, sub rosa, under the radar, under wraps, under-the-table, unperceived