soot
/sut; sʊt/ n[U]
black powder in the smoke of wood, coal, etc 炱; 烟中的黑灰
sweep the soot out of the chimney 把烟囱里的黑灰扫掉
One small fire in the kitchen covered the whole house in soot. 厨房里只有一个小火炉就把整个房子都熏黑了. soot, v (phr v) soot sth up (usu passive 通常用於被动语态) cover sth with soot 使某物蒙上黑烟灰
The flue has become sooted up. 烟道里都是黑灰.