FILTHY
filthy, foul, nasty
(adjective) disgustingly dirty; filled or smeared with offensive matter; “as filthy as a pigsty”; “a foul pond”; “a nasty pigsty of a room”
cruddy, filthy, foul, nasty, smutty
(adjective) characterized by obscenity; “had a filthy mouth”; “foul language”; “smutty jokes”
dirty, filthy, lousy
(adjective) vile; despicable; “a dirty (or lousy) trick”; “a filthy traitor”
Source: WordNet® 3.1
Etymology
Adjective
filthy (comparative filthier, superlative filthiest)
Covered with filth; very dirty.
Obscene or offensive.
Very unpleasant or disagreeable.
Synonyms
• (covered with filth): sleazy, slimy, grimy, horry
• (obscene): gruesome, smutty
Antonyms
• (covered with filth): pristine
• (obscene): holy, venerable
Verb
filthy (third-person singular simple present filthies, present participle filthying, simple past and past participle filthied)
(transitive) To make very dirty; to cover in filth.
Source: Wiktionary
Filth"y, a. [Compar. Filthier; superl. Filthiest.]
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition