WordNet sense 1 ((of soil) soft and watery):

boggy, marshy, miry, mucky, sloppy, soggy, squashy, swampy, waterlogged, quaggy, sloughy

WordNet sense 2 (covered or soaked with a liquid such as water):

wet

WordNet sense 3 ((of color) discolored by impurities; not bright and clear):

dingy, muddied, dingy

WordNet sense 4 (combined with extraneous elements):

impure

WordNet sense 5 (dirty with mud):

muddy up

WordNet sense 6 ((of especially liquids) clouded as with sediment):

cloudy, murky, turbid, mirky

WordNet sense 7 (not clear; not transmitting or reflecting light or radiant energy):

opaque

WordNet sense 8 (soiled or likely to soil with dirt or grime):

dirty, unclean, soiled