murky (adj.)
- ambiguous
- amorphous
- black
- blackened
- bleak
- blind
- blotchy
- caliginous
- clouded
- cloudy
- dark
- dark-colored
- darkened
- darkish
- dim
- dingy
- dirty
- dismal
- double-edged
- double-faced
- drab
- dreary
- dun
- dusky
- equivocal
- filthy
- foggy
- foul
- foxy
- funereal
- fuzzy
- glooming
- gloomy
- glowering
- grey
- grim
- grimy
- grubby
- hazy
- indeterminate
- indistinct
- inky
- lowering
- misty
- mucky
- muddy
- nasty
- nebulous
- obscure
- opaque
- overcast
- roily
- semidark
- shadowy
- shady
- shapeless
- sibylline
- smoky
- smudgy
- smutty
- soiled
- somber
- sooty
- sordid
- squalid
- stained
- stigmatic
- subfusc
- tainted
- tarnished
- tenebrous
- threatening
- transcendent
- turbid
- unclean
- unclear
- vague
So scented the grim Feature, and upturn'd
His nostril wide into the murky air,
Sagacious of his quarry from so far.