se·cre·tive /ˈsikrətɪv, sɪˈkri-/
  (a.)祕密的,偷偷摸摸的,分泌的
  Se·cret·ive a. Tending to secrete, or to keep secret or private; as, a secretive disposition.
  ◄ ►
  secretive
       adj : inclined to secrecy or reticence about divulging
             information; "although they knew her whereabouts her
             friends kept close about it" [syn: close, closelipped,
              closemouthed, tightlipped]