confidential

adjective

1. 1

   Kept, or meant to be kept, secret within a certain circle of persons; not intended to be known publicly

   “The newspaper claims a leaked confidential report by the government admits to problems with corrupt MPs.”

2. 2

   Inclined to share confidences; (of things) making people inclined to share confidences; involving the sharing of confidences.

   “Sitting in front of the fire, they became quite confidential, and began to gossip.”

3. 3

   Having someone's confidence or trust; having a position requiring trust; worthy of being trusted with confidences.

   “a confidential agent; a confidential servant; a confidential whisper”