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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.

“We were always told that coal is the dirtiest fuel,” Fox Business host Stuart Varney observed to Burgum during an on-air interview last month.

From Los Angeles Times • Mar. 5, 2026

Rising natural-gas prices boost the dirtiest fossil fuel.

From The Wall Street Journal • Mar. 5, 2026

It ranges from the greenest to the dirtiest, from established technologies to speculative ones, and even includes companies that play tangential roles in the sector.

From The Wall Street Journal • Dec. 24, 2025

Santa Monica Pier routinely tops the yearly list of the state’s dirtiest beaches by environmental nonprofit Heal the Bay, which tests waters up and down the California coast for fecal bacteria, which can harm beachgoers.

From Los Angeles Times • Sep. 15, 2025

Once, it happened to Nick, who is the dirtiest kid in school, not very big, red hair.

From "Everything Sad Is Untrue" by Daniel Nayeri