MUD help system
Usage: unlock [direction] door
Unlock command is used to unlock doors in a given room. If the room just has only one door it can be used without [direction] argument, otherwise you should refer which door to close. [direction] should be the exit where the door is (it's called direction to mean "north", "south", etc, but for instance an exit "enter" may have a door, and thus you should use "enter" as direction).
To unlock a door you need to have in one of your hands the proper item key.
See also: open, close, lock