Opaque
From Elendor
Flag: OPAQUE (all types) When set on yourself, it prevents other players from seeing what you are carrying in your inventory. This applies to everyone and everything, even wizards and royalty, or to stuff that you own. It works the same way on objects. When set on an exit in a TRANSPARENT room, the exit is displayed as if the room weren't TRANSPARENT. Meaningless for rooms. See also: transparent, look