The secret nature of the society allowed for discreet political discussion.

Given the secret nature of the unit, there is almost no reliable information available.

But for their family and friends, the secret nature of the work can complicate conversation.

He asked not to be identified by name because of the secret nature of his job.

Much is said here that is of a secret nature.

In case there was doubt about its secret nature, a sign on the door read, "Closed."

The secret nature of the supporting rounds makes them no less important.

Her shallow secret nature was troubled when their eyes met.

Could he guarantee that the secret nature of the planning be maintained?