dirtier
dir-ti-er
adjective
More soiled, unclean, or morally corrupt than something else.
"The car got dirtier on the muddy road."
Thesaurus
Synonyms: foul-mouthed, off-color, lewd, bawdy, profane, ribald, cruddy, obscene, raunchy, filthy, foul-spoken, salacious
Antonyms: clean, make clean, uncontaminating, unobjectionable