blacken
verb
[ ˈblak(ə)n ]
• make or become black or dark, especially as a result of burning, decay, or bruising.
• "stone blackened by the soot of ages"
Similar:
make black,
black,
darken,
make dark/darker,
dirty,
make dirty,
make sooty,
make smoky,
stain,
grime,
begrime,
befoul,
soil,
grow/become black,
dim,
grow dim,
cloud over,
