inwall

[ verb in-wawl; noun in-wawl ]
/ verb ɪnˈwɔl; noun ˈɪnˌwɔl /

verb (used with object)

to enclose with a wall.

noun

an inner wall.
Metallurgy. an inwardly sloping wall above the bosh of a blast furnace.

Origin of inwall

First recorded in 1605–15; in-1 + wall
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019