especially of a ship's lines etc; "with its sails afoul"; "a foul anchor"
spot, stain, or pollute; "The townspeople defiled the river by emptying raw sewage into it"
disgustingly dirty; filled or smeared with offensive matter;
make impure; "The industrial wastes polluted the lake"
characterized by obscenity;
commit a foul; break the rules
(of a baseball) not hit between the foul lines
hit a foul ball
violating accepted standards or rules; "a dirty fighter"; "used foul means to gain power"; "a nasty unsporting serve"; "fined for unsportsmanlike behavior"
an act that violates the rules of a sport
become or cause to become obstructed; "The leaves clog our drains in the Fall"; "The water pipe is backed up"
offensively malodorous; "a foul odor"; "the kitchen smelled really funky"
(of a manuscript) defaced with changes; "foul (or dirty)
LOATHSOME
highly offensive; arousing aversion or disgust;
causing or able to cause nausea; "a nauseating smell"; "nauseous offal"; "a sickening stench"
NASTY
exasperatingly difficult to handle or circumvent;
offensive or even (of persons) malicious;
disgustingly dirty; filled or smeared with offensive matter;
characterized by obscenity;
ODIOUS
unequivocally detestable;
Hateful
Extremely unpleasant
UGSOME
Ugly; offensive; loathsome.
VILE
morally reprehensible; "would do something as despicable as murder"; "ugly crimes"; "the vile development of slavery appalled them"; "a slimy little liar"
causing or able to cause nausea; "a nauseating smell"; "nauseous offal"; "a sickening stench"