Foul

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A Scheme for abolishing all Words is one of the wittiest and smartest comments on semantics. (Illustration: extreme close-up from the movie "The Big Swallow" (1901), produced and directed by James Williamson (1855-1933)

Covered with, or containing, extraneous matter which is injurious, noxious, offensive, or obstructive; filthy; dirty; unclean; polluted; nasty; defiled; as, a foul cloth; foul hands; a foul chimney; foul air; a ship's bottom is foul when overgrown with barnacles; a gun becomes foul from repeated firing; a well is foul with polluted water.
Cap'n, she's all fouled up.
Scurrilous; obscene or profane; abusive; as, foul words; foul language.
The rascal spewed forth a series of foul pronouncements.
Hateful; detestable; shameful; odious; wretched.
He has a foul set of friends.
Loathsome; disgusting; as, a foul disease.
This foul food is making me wretch.
Ugly; homely; poor.
Not favorable; unpropitious; not fair or advantageous; as, a foul wind; a foul road; cloudy or rainy; stormy; not fair; -- said of the weather, sky, etc.
Some foul weather is brewing.
Not conformed to the established rules and customs of a game, conflict, test, etc.; unfair; dishonest; dishonorable; cheating; as, foul play.
Foul play is not suspected.

See also