adjectives
entrusted with private information and the confidence of another
"a confidential secretary"
is similar to
confined to particular persons or groups or providing privacy
"a private place"; "private discussions"; "private lessons"; "a private club"; "a private secretary"; "private property"; "the former President is now a private citizen"; "public figures struggle to maintain a private life"
(of information) given in confidence or in secret
"this arrangement must be kept confidential"; "their secret communications"
denoting confidence or intimacy
"a confidential approach"; "in confidential tone of voice"
is similar to
close in relevance or relationship
"a close family"; "we are all...in close sympathy with..."; "close kin"; "a close resemblance"
the level of official classification for documents next above restricted and below secret; available only to persons authorized to see documents so classified
is similar to
official classification of information or documents; withheld from general circulation
"thousands of classified documents have now been declassified"