Meaning
The refractory lining of the stack of a blast furnace; or the interior walls or lining of a shaft furnace.
Etymology
Origin: Unknown
From in- + wall.
NYT Puzzle Appearances
No published puzzle dates on file for this word yet. It is part of the official NYT Spelling Bee word list for 2019, 2020, 2022, 2023, 2025, 2026.