fallway

Etymology
From.

Noun

 * 1)  A well or opening, through the successive floors of a factory or warehouse or the decks of a ship, providing access for goods, material, or people.
 * 2) A hydraulic canal, as for a water-powered mill.
 * 1) A hydraulic canal, as for a water-powered mill.
 * 1) A hydraulic canal, as for a water-powered mill.