Filthy, a. [Compar. Filthier; superl. Filthiest.]
Defiled with filth, whether material or moral; nasty; dirty; polluted; foul; impure; obscene. "In the filthy-mantled pool." Shak. He which is filthy let him be filthy still. Rev. xxii. 11.
Syn. -- Nasty; foul; dirty; squalid; unclean; sluttish; gross; vulgar; licentious. See Nasty.
Shades of meaning
Fernald lists filthy only as an antonym, under pure.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given