adj.鬼鬼祟祟的，秘密的,
Merriam-Webster Online Dictionary
secretive (adjective)disposed to not open or outgoing in speech, activity, or purposes - secrecy silent
Merriam-Webster Online Thesaurus
secretive (adjective)given to keeping one's activities hidden from public observation or knowledge
SYNONYMS:
close, closemouthed, dark, reticent, tight-mouthed, uncommunicativeRELATED WORDS:
quiet, reserved, silent, taciturn, tight-lipped; discreet, prudent; clandestine, covert, furtive, hugger-mugger, secret, sneak, sneaky, stealthy, surreptitious, undercover, underhand, underhandedNEAR ANTONYMS:
candid, frank, honest, out-front, up-front; blunt, outspoken, tactless