Showing results for dirtiest. Search instead for Siltiest.

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.

Coal is relatively inexpensive to produce but is the dirtiest fossil fuel, releasing considerable particulate air pollution, sulfur dioxide and mercury, and nearly twice the planet-warming carbon dioxide as natural gas.

From Los Angeles Times • Feb. 11, 2026

At Murphy Road Recycling’s material recovery facility near Hartford, the machines are taking over the dirtiest jobs.

From The Wall Street Journal • Jan. 7, 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

While China ramps up its renewables, it continues to rely heavily on coal, the dirtiest fossil fuel.

From BBC • Sep. 24, 2025

The person you think is the dirtiest, meanest person in the world got a side you can get to—if you know how to do it.

From "Our America: Life and Death on the South Side of Chicago" by LeAlan Jones