adjective
dirtier; -est
not clean
indecent and offensive
relating to sex in an indecent or offensive way
not fair or honest
very bad :deserving to be hated or regretted
likely to cause shame or disgrace
difficult or unpleasant
To get your hands dirty is to do difficult and often unpleasant work.
showing dislike or anger
not clear or bright in color
verb
dirties; dirtied; dirtying
[+ obj] :to make (something) dirty
adverb
in an unfair or dishonest way
in an indecent or offensive way