filthy: Definition, Synonyms and Much More from Answers.com

adj., -i·er, -i·est.

1. Covered or smeared with filth; disgustingly dirty. See synonyms at dirty.
2. Obscene; scatological.
3. Vile; nasty: a filthy traitor.

filthily filth'i·ly adv.
filthiness filth'i·ness n.

adjective

1. Covered or stained with or as if with dirt or other impurities: black, dirty, grimy, grubby, smutty, soiled, unclean, uncleanly. See clean/dirty.
2. Heavily soiled; very dirty or unclean: foul, nasty, squalid, vile. See clean/dirty.
3. Offensive to accepted standards of decency: barnyard, bawdy, broad, coarse, dirty, Fescennine, foul, gross, lewd, nasty, obscene, profane, ribald, scatologic, scatological, scurrilous, smutty, vulgar. Slang raunchy. See decent/indecent.
4. So objectionable as to elicit despisal or deserve condemnation: abhorrent, abominable, antipathetic, contemptible, despicable, despisable, detestable, disgusting, foul, infamous, loathsome, lousy, low, mean², nasty, nefarious, obnoxious, odious, repugnant, rotten, shabby, vile, wretched. See good/bad.

adj

Definition: vulgar, obscene
Antonyms: chaste, clean, decent, pure

IN BRIEF: Very dirty.

The child had to take a bath because he was so filthy.

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