faceplate

Example:The opening of the machine needs to be covered to prevent debris from entering.

Definition:A hole or space through which something can be seen, touched, or passed through.

Example:The exposed wiring was a safety hazard and needed to be covered.

Definition:Not covered, hidden, or protected; left out in the open.

Example:Bare metal can rust if not protected with a coating or paint.

Definition:Uncovered, exposed, or without an overlay or a covering.