doomuez (/ˈduːmuz/)

doomuez nm. Choshue Undercity — The mechanical works that operate underneath a city. Typically sewers, but could also be running water and other sorts of conduits. Less commonly, there are tunnels people can use to travel underneath the city. In the extreme case of Nezhgub, the Doomuez is an endless maze of mechanical equipment, tunnels, transports, and hidden living quarters.