1) Behind a blind 2) Buried 3) Cloaked 4) Hidden 5) Invisible 6) Not accessible to view 7) Out of sight 8) Secreted 9) Unknown 10) Unseeable 11) Unseen 12) Veiled 1) Buried 2) Bushwhacking 3) Camouflaged 4) Cloaked 5) Confidential 6) Covert 7) Delitescent 8) Dormant 9) Furtive 10) Hid 11) Hidden 12) Incognito 13) Invisible 14) Latent 15) Lurking 16) Masked 17) Obscure 18) Perdu 19) Secret 20) Skulking 21) Sneak 22) Sneaking 23) Stealthy 24) Suppressed 25) Surreptitious 
• (a.) Hidden; kept from sight; secreted. • (imp. & p. p.) of Conceal
Con·cealed' adjective Hidden; kept from sight; secreted. -- 
Hidden from ordinary observation.
[adj] - not accessible to view 2. [adj] - concealed or hidden on any grounds for any motive
concealed That which was kept from being seen, found, observed, or discovered.
See Built-in.
hidden adjective not accessible to view; `concealed (or hidden) damage`; `in stormy weather the stars are out of sight`