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v. Present participle of foul.

n. The adhesion of a foreign material onto a surface, especially so as to reduce its functionality

"= The fouling which results from firing is of two kinds -- the _powder fouling_, from the burning of the powder; and the _metal fouling_, from the nickel scraped off the bullet as it passes through the bore."

dirty    soiled    unclean    illegible    Stinky    malodourous    unpleasant-smelling    ill-smelling    malodorous    tangled   

fouled    fouling    foulness    fouls   

bemire    dirty    begrime    colly    grime    soil    change    shame    disgrace    attaint   

contaminate    foul play    to make foul water    to claim a. foul    to foul out    foul proof    foul fish    foul anchor    foul ball    foul berth   

fouled    fouling    befoul    nonfouling    nonfoul    afoul   

bird    filthy    dirty    polluted    nasty    defiled    scurrilous    abusive    hateful    detestable   

Raul    afoul    cowl    crowl    fowl    growl    howl    jowl    owl    prowl   

vile    filthy    horrible    ugly    treacherous    monstrous    miserable    poisonous    hot