attaint
bedaub
begrime
bemire
bemud
besmear
besmirch
bestain
blacken
blur
brand
darken
daub
dirt
dirty
dirty up
discolor
dust
grime
mark
mire
muck
muck up
muddy
scorch
sear
singe
slime
slubber
slur
smear
smirch
smoke
soil
soot
stain
stigmatize
taint
tarnish