smutch

To soil or stain.

A stain or spot of dirt.

To blacken with smoke, soot, or the like; smudge.

A black spot; a black stain; a smudge.

A stain; a dirty spot.

To blacken with smoke, soot, or coal.

To soil, stain or smudge

A stain, smudge or blot

make a smudge on; soil by smudging