darken (v.)
- attaint
- bandage
- becloud
- bedaub
- bedazzle
- bedim
- befog
- benight
- besmear
- besmirch
- black
- blacken
- blackwash
- blanch
- blind
- blindfold
- blot
- blotch
- blur
- blush
- brand
- brown
- charcoal
- cloud
- color
- cork
- crimson
- damp
- dampen
- dash
- daub
- daze
- dazzle
- deject
- denigrate
- depress
- dim
- dinge
- dirty
- discolor
- discourage
- dishearten
- dispirit
- dusk
- ebonize
- eclipse
- flush
- fog
- glare
- glow
- gouge
- haze
- hoodwink
- ink
- lower
- mantle
- mark
- melanize
- mist
- murk
- nubilate
- obfuscate
- obnubilate
- obscure
- occult
- oppress
- overcast
- overcloud
- overshadow
- pale
- redden
- sadden
- scorch
- sear
- shade
- shadow
- singe
- sink
- slur
- smear
- smirch
- smoke
- smudge
- smut
- smutch
- snow-blind
- soil
- soot
- taint
- tarnish
- whiten