clandestine, secret or furtive
The backstairs (stairs at the rear of a building).
Denoting anything kept a secret or private.
closeted, secret (especially with reference to gay people who are in the closet)
A small room within a house used to store clothing, food, or other household supplies.
A secret or hiding place, (particularly) the hiding place in English idioms such as in the closet and skeleton in the closet.
One intended for storing clothes or bedclothes.
A state or condition of secrecy, privacy, or obscurity.
An ordinary similar to a bar but half as broad.
The closet can be a scary place for a gay teenager.
To shut away for private discussion.
To put into a private place for a secret interview or interrogation.
To shut up in, or as in, a closet for concealment or confinement.