Verbs

(v)dirty, soil, begrime, grime, colly, bemiremake soiled, filthy, or dirty“don't soil your clothes when you play outside!”

Adjectives

(a)dirty, soiled, uncleansoiled or likely to soil with dirt or grime“dirty unswept sidewalks”, “a child in dirty overalls”, “dirty slums”, “piles of dirty dishes”, “put his dirty feet on the clean sheet”, “wore an unclean shirt”, “mining is a dirty job”, “Cinderella did the dirty work while her sisters preened themselves”
(a)dirty(of behavior or especially language) characterized by obscenity or indecency“dirty words”, “a dirty old man”, “dirty books and movies”, “boys telling dirty jokes”, “has a dirty mouth”
(s)dirty, filthy, lousyvile; despicable“a dirty (or lousy) trick”, “a filthy traitor”
(a)dirty, contaminatingspreading pollution or contamination; especially radioactive contamination“the air near the foundry was always dirty”, “a dirty bomb releases enormous amounts of long-lived radioactive fallout”
(s)dirty, pestiferouscontaminated with infecting organisms“dirty wounds”, “obliged to go into infected rooms” (Jane Austen)
(s)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)dirty, foul, marked-up(of a manuscript) defaced with changes“foul (or dirty) copy”
(s)dirty, ill-gottenobtained illegally or by improper means“dirty money”, “ill-gotten gains”
(s)dirtyexpressing or revealing hostility or dislike“dirty looks”
(s)cheating, dirty, foul, unsporting, unsportsmanlikeviolating accepted standards or rules“a dirty fighter”, “used foul means to gain power”, “a nasty unsporting serve”, “fined for unsportsmanlike behavior”
(s)dirty, sordid, shoddyunethical or dishonest“dirty police officers”, “a sordid political campaign”, “shoddy business practices”
(s)dirtyunpleasantly stormy“there's dirty weather in the offing”