soot
nounUK /sʊt/
US /sʊt/
Soot is the black dust that comes from smoke and sticks to things.
The chimney was covered in black soot.
OTHER MEANINGS
2. To cover or blacken something with soot.
The old pots were sooted from years over the fire.
3. Fine black particles produced by burning wood, coal, or oil.
Soot from the factory settled on the rooftops.
4. A dark smudge or stain left by smoke.
He wiped the soot off his face after fixing the stove.