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dirtiest

ADJECTIVE

soiled, unclean

Synonyms

STRONGEST

contaminated crummy disheveled dusty filthy greasy grimy messy muddy murky nasty polluted sloppy stained unkempt

STRONG

bedraggled begrimed black defiled disarrayed foul fouled smudged spattered spotted sullied

WEAK

cruddy dishabille dreggy dungy grubby grungy icky lousy mucky mung pigpen raunchy scummy scuzzy slatternly slimy slovenly smutty sooty squalid straggly undusted unhygienic unlaundered unsanitary unsightly unswept untidy unwashed yucky

Antonyms

STRONGEST

bright clean clear decent neat ordered orderly pure sterile tidy

STRONG

good

WEAK

moral nice spotless upright

ADJECTIVE

obscene, pornographic

Synonyms

STRONGEST

coarse filthy nasty

STRONG

base blue low mean unclean

WEAK

contemptible despicable immoral impure indecent lewd off-color ribald risqué salacious scatological scurvy smutty sordid squalid unchaste uncleanly vile vulgar

Antonyms

STRONGEST

clean decent

STRONG

happy honest moral noble

WEAK

nice pure spotless sterile upright

ADJECTIVE

dishonest

Synonyms

STRONGEST

sleazy

STRONG

cheating corrupt crooked foul

WEAK

below the belt deceitful double-dealing shabby shady shifty sneaky sordid underhanded unethical unscrupulous untruthful

Antonyms

STRONG

clean good honest moral pure

WEAK

nice spotless sterile upright

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.

Rising natural-gas prices boost the dirtiest fossil fuel.

From The Wall Street Journal • Mar. 5, 2026

He urges his team to hire “somebody that has dealt in the dirtiest of dirtiest dirty business of media and propaganda.”

From The Wall Street Journal • Dec. 14, 2025

Of the more than 500 beaches that Heal the Bay monitored in 2024, the top 10 dirtiest also included four in San Diego County, three in San Mateo County and one in Marin County.

From Los Angeles Times • May 22, 2025

The Colstrip power plant in Montana, considered one of the dirtiest coal plants in the nation, is among those who have applied for the pass.

From Los Angeles Times • Apr. 5, 2025

He lifted out the dirtiest, most ragged pair of britches I had ever seen in my life.

From "Summer of the Monkeys" by Wilson Rawls