W: (adj) clean [Indirect via dirty] (free from dirt or impurities; or having clean habits) "children with clean shining faces"; "clean white shirts"; "clean dishes"; "a spotlessly clean house"; "cats are clean animals"
S: (adj) dirty, dingy, muddied, muddy ((of color) discolored by impurities; not bright and clear) "dirty" is often used in combination; "a dirty (or dingy) white"; "the muddied grey of the sea"; "muddy colors"; "dirty-green walls"; "dirty-blonde hair"
S: (adj) cloudy, muddy, mirky, murky, turbid ((of liquids) clouded as with sediment) "a cloudy liquid"; "muddy coffee"; "murky waters"