Secretive

a.

1.

Tending to secrete, or to keep secret or private; as, a secretive disposition.

Adj.

1.

secretive - inclined to secrecy or reticence about divulging information; "although they knew her whereabouts her friends kept close about it" Synonyms: closelipped, closemouthed, tightlipped, close

close, closemouthed, dark, discreet, disinclined to communicate, evasive, excretory, lachrymal, lachrymose, lacrimatory, lactational, lacteal, lacteous, meaningless, mum, reserved, reticent, rheumy, salivant, salivary, salivous, secret, secretional, secretory, seminal, serous, shifty, sialagogic, silent, spermatic, taciturn, tight-lipped, uncommunicative, unconversable, unsociable, watering, watery