grime

Grime is gross, greasy, ingrained dirt, like the grime on your neighbor's van that tempts you to write "Clean Me" in it with your finger.

You may find grime under your fingernails for days after your auto mechanics class, black oily dirt that requires a lot of scrubbing to remove. It's less common, but you can also use this word as a verb, meaning to make something this dirty: "They're going to grime the kitchen floor if they don't take their boots off!" The Germanic root of grime means "to smear."

Definitions of grime
  1. noun
    the state of being covered with unclean things
    synonyms: dirt, filth, grease, grunge, soil, stain
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    type of:
    dirtiness, uncleanness
    the state of being unsanitary
  2. verb
    make soiled, filthy, or dirty
    synonyms: begrime, bemire, colly, dirty, soil
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    Antonyms:
    clean, make clean
    make clean by removing dirt, filth, or unwanted substances from
    clean, clean house, houseclean
    clean and tidy up the house
    clean
    be cleanable
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    types:
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    foul
    make unclean
    contaminate, foul, pollute
    make impure
    smear
    stain by smearing or daubing with a dirty substance
    slime
    cover or stain with slime
    muddy, muddy up
    dirty with mud
    splash
    soil or stain with a splashed liquid
    mire, muck, muck up, mud
    soil with mud, muck, or mire
    crock
    soil with or as with crock
    blemish, spot
    mar or impair with a flaw
    infect, taint
    contaminate with a disease or microorganism
    moil
    moisten or soil
    besmirch, smirch
    smear so as to make dirty or stained
    pollute
    contaminate (the environment) with waste or harmful substances
    type of:
    alter, change, modify
    cause to change; make different; cause a transformation
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