Wlink

This command is used in building to link the current room to a target room.

From "help wlink:"

Wlink:

Usage: wlink <room#>
Usage: wlink null (remove link west)

This command links an exit to the west from the current room to the target 
room and also links an exit to the east from the target room to the current 
room.

For more information, see: help nlink, help elink, help slink, help wlink,
                           help ulink, help dlink, help rlist