煤すすける

ichidan verb, intransitive verb

become sooty; get stained with soot

Describes surfaces or objects that have become darkened or discolored by soot or smoke over time.

• 長なが年ねん使つかった天てん井じょうがすすけて黒くろくなった。

  The ceiling, used for many years, became sooty and turned black.

• 暖だん炉ろの上うえの壁かべがすすけている。

  The wall above the fireplace is stained with soot.