say it: klan-DEH-stin
clandestine is an adjective meaning "conducted with or marked by hidden aims or methods". It carries one recorded sense.
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”
Definitions, synonyms and semantic relations for clandestine come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.