a. 肮脏（dirty的最高级形式）

a soiled or likely to soil with dirt or grime

a (of behavior or especially language) characterized by obscenity or indecency

s vile; despicable

a spreading pollution or contamination; especially radioactive contamination

s contaminated with infecting organisms

s (of color) discolored by impurities; not bright and clear

s (of a manuscript) defaced with changes

s obtained illegally or by improper means

s expressing or revealing hostility or dislike

s violating accepted standards or rules

s unethical or dishonest

s unpleasantly stormy