Thesaurus.com
Dictionary.com
Definitions

filthy

[fil-thee] / ˈfɪl θi /
ADJECTIVE
dirty, polluted
Synonyms
STRONGEST
disheveled grimy grubby grungy muddy nasty soiled squalid
WEAK
begrimed cruddy fecal feculent foul gross impure loathsome miry mucky putrid repulsive revolting scummy slimy slipshod sloppy slovenly smoky soily sooty unclean uncleanly unkempt unwashed verminous vile yecchy yucky
Antonyms
STRONGEST
clean pure
WEAK
sterile unpolluted
ADJECTIVE
vulgar, obscene
Synonyms
STRONGEST
indecent nasty vicious
WEAK
base bawdy blue coarse contemptible corrupt depraved despicable dirty-minded foul foul-mouthed impure lewd licentious low mean offensive pornographic raunchy scatological scurvy smutty suggestive vile
Antonyms
STRONGEST
clean decent friendly kind pleasant
WEAK
chaste pure sterile unpolluted

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

PowerWash Simulator sees players don their cleaning gear and hose down a variety of filthy in-game locations until they're sparkling and spotless.

From BBC • Apr. 3, 2026

Fruit makes up more than half of the filthy bunch, according to a report released Tuesday by the nonprofit.

From Salon • Mar. 26, 2026

Norway still exports plenty of oil and gas to the rest of Europe, while China’s electric age has been backed by filthy coal.

From Slate • Mar. 12, 2026

"The smell is awful, very pungent. It is also unpleasant to look at. It looks filthy," said Nurhasanah, who like many Indonesians only has one name.

From Barron's • Feb. 17, 2026

“Simon!” the no longer horrible Incorrigibles yelled, and ran to hug him, filthy as he was.

From "The Long-Lost Home" by Maryrose Wood

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.