· an act that violates the rules of a sport

Hypernym(s): violation, infringement

· hit a foul ball

Hypernym(s): hit

· make impure; "The industrial wastes polluted the lake"

Synonym(s): pollute, contaminate

Hypernym(s): dirty, soil, begrime, grime, colly, bemire

· become or cause to become obstructed; "The leaves clog our drains in the Fall"; "The water pipe is backed up"

Synonym(s): clog, choke_off, clog_up, back_up, congest, choke

Hypernym(s): obstruct, obturate, impede, occlude, jam, block, close_up

· commit a foul; break the rules

Hypernym(s): play

· spot, stain, or pollute; "The townspeople defiled the river by emptying raw sewage into it"

Synonym(s): befoul, defile, maculate

Hypernym(s): dishonor, disgrace, dishonour, attaint, shame

· make unclean; "foul the water"

Hypernym(s): dirty, soil, begrime, grime, colly, bemire

· become soiled and dirty

Hypernym(s): change

· highly offensive; arousing aversion or disgust; "a disgusting smell"; "distasteful language"; "a loathsome disease"; "the idea of eating meat is repellent to me"; "revolting food"; "a wicked stench"

Synonym(s): disgusting, disgustful, distasteful, loathly, loathsome, repellent, repellant, repelling, revolting, skanky, wicked, yucky

· offensively malodorous; "a foul odor"; "the kitchen smelled really funky"

Synonym(s): fetid, foetid, foul-smelling, funky, noisome, smelly, stinking, ill-scented

· violating accepted standards or rules; "a dirty fighter"; "used foul means to gain power"; "a nasty unsporting serve"; "fined for unsportsmanlike behavior"

Synonym(s): cheating, dirty, unsporting, unsportsmanlike

· (of a baseball) not hit between the foul lines

Antonym(s): fair

· (of a manuscript) defaced with changes; "foul (or dirty) copy"

Synonym(s): dirty, marked-up

· characterized by obscenity; "had a filthy mouth"; "foul language"; "smutty jokes"

Synonym(s): cruddy, filthy, nasty, smutty

· disgustingly dirty; filled or smeared with offensive matter; "as filthy as a pigsty"; "a foul pond"; "a nasty pigsty of a room"

Synonym(s): filthy, nasty

· especially of a ship's lines etc; "with its sails afoul"; "a foul anchor"

Synonym(s): afoul, fouled