hidden (
http://definr.com/hidden)
adj 1: not accessible to view; "concealed (or hidden) damage"; "in
stormy weather the stars are out of sight" [syn:
concealed,
out of sight]
2: covered from view; "her face buried (or hidden) in her
hands"; "a secret buried deep within herself" [syn:
buried]
3: designed to elude detection; "a hidden room or place of
concealment such as a priest hole"; "a secret passage";
"the secret compartment in the desk" [syn:
secret]
4: difficult to find; "hidden valleys"; "a hidden cave"; "an
obscure retreat" [syn:
obscure]