Inside the Universes

'overlayer'

[sheathing.n.01] as in: protective covering consisting, for example, of a layer of boards applied to the studs and joists of a building to strengthen it and serve as a foundation for a weatherproof exterior

Origins

					overlayer (English)
├── layer (English)
│   └── leyer (Middle English (1100-1500))
└── over- (English)
    └── over- (Middle English (1100-1500))
        └── ofer- (Old English (ca. 450-1100))