Soiled or likely to soil with dirt or grime:
— Wore an unclean shirt.

synonyms: dirty, soiled.

Roget 653: dirty, filthy, grimy; unclean, impure; soiled etc. v.; not to be handled with kid gloves; dusty, snuffy^†, smutty, sooty, smoky; thick, turbid, dreggy; slimy; mussy [U.S.].    slovenly, untidy, messy, uncleanly.    [of people] unkempt, sluttish, dowdy, draggle-tailed; uncombed.    unscoured^†, unswept^†, unwiped^†, unwashed, unstrained, unpurified^†; squalid; lutose^†, slammocky^†, slummocky^†, sozzly^†.    nasty, coarse, foul, offensive, abominable, beastly, reeky, reechy^†; fetid etc. 401.    [of rotting living matter] decayed, moldy, musty, mildewed, rusty, moth-eaten, mucid^†, rancid, weak, bad, gone bad, etercoral^†, lentiginous^†, touched, fusty, effete, reasty^†, rotten, corrupt, tainted, high, flyblown, maggoty; putrid, putrefactive, putrescent, putrefied; saprogenic, saprogenous^†; purulent, carious, peccant; fecal, feculent; stercoraceous^†, excrementitious^†; scurfy, scurvy, impetiginous^†; gory, bloody; rotting etc. v.; rotten as a pear, rotten as cheese.    crapulous etc. (intemperate) 954^†; gross etc. (impure in mind) 961; fimetarious^†, fimicolous^†.    ... show more

Dutch: besmeurd
Polish: brudny, zabrudzony

Having a physical or moral blemish so as to make impure according to dietary or ceremonial laws:
— Unclean meat.
— And the swine...is unclean to you.

synonym: impure.

Roget 961: impure; unclean etc. (dirty) 653; not to be mentioned to ears polite; immodest, shameless; indecorous, indelicate, indecent; Fescennine; loose, risque [Fr.], coarse, gross, broad, free, equivocal, smutty, fulsome, ribald, obscene, bawdy, pornographic.    concupiscent, prurient, lickerish^†, rampant, lustful; carnal, carnal-minded; lewd, lascivious, lecherous, libidinous, erotic, ruttish, salacious; Paphian; voluptuous; goatish, must, musty.    unchaste, light, wanton, licentious, debauched, dissolute; of loose character, of easy virtue; frail, gay, riggish^†, incontinent, meretricious, rakish, gallant, dissipated; no better than she should be; on the town, on the streets, on the pave, on the loose.    adulterous, incestuous, bestial.    ... show more