SECRETIVE
close, closelipped, closemouthed, secretive, tightlipped
(adjective) inclined to secrecy or reticence about divulging information; “although they knew her whereabouts her friends kept close about it”
Source: WordNet® 3.1
Etymology 1
Adjective
secretive (comparative more secretive, superlative most secretive)
Having an inclination to secrecy
Synonyms
• furtive
• sly
• See also covert
Etymology 2
Adjective
secretive (not comparable)
Relating to secretion
Anagrams
• receivest, resective
Source: Wiktionary
Se*cret"ive, a.
Definition: Tending to secrete, or to keep secret or private; as, a
secretive disposition.
Source: Webster’s Unabridged Dictionary 1913 Edition