inwall

To wall in; inclose or fortify with a wall.

An inner wall.

Specifically, the interior wall of a blast-furnace.

To inclose or fortify as with a wall.

An inner wall; specifically (Metal.), the inner wall, or lining, of a blast furnace.

The refractory lining of the stack of a blast furnace; or the interior walls or lining of a shaft furnace.

To shut in or enclose with walls.