smeared with something that soils or stains; these words are often used in combination; "oil-smeared work clothes"; "hostile faces smirched by the grime and rust"- Henry Roth; "ink-smudged fingers"
(of soil) soft and watery; "the ground was boggy under foot"; "a marshy coastline"; "miry roads"; "wet mucky lowland"; "muddy barnyard"; "quaggy terrain"; "the sloughy edge of the pond"; "swampy bayous"