Objectionable, unpleasant (of a thing); repellent, offensive.
Spiteful, unkind.
Grave or dangerous (of an accident, illness etc.).
Contemptible, unpleasant (of a person).
Awkward, difficult to navigate; dangerous.
Dirty, filthy.
Indecent or offensive; obscene, lewd.
Formidable, terrific; wicked.
Sexual intercourse.
Something nasty.
A video nasty.
Shows that the given adjective is desirable, or acts as a mild intensifier; pleasantly, quite.
Of a person: friendly, attractive.
Pleasant, satisfactory.
Respectable; virtuous.
Showing or requiring great precision or sensitive discernment; subtle.
Showing refinement or delicacy, proper, seemly
Used to signify approval.
Used to signify a job well done.
To run a process with a specified (usually lower) priority.
Nicely.
niceness.