grime /ˈgraɪm/
  塵垢,煤塵,汙點(vt.)使汙穢,汙濁
  Grime n.  Foul matter; dirt, rubbed in; sullying blackness, deeply ingrained.
  Grime, v. t. To sully or soil deeply; to dirt.
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  grime
       n : the state of being covered with unclean things [syn: dirt,
            filth, soil, stain, grease, grunge]
       v : make soiled, filthy, or dirty; "don't soil your clothes when
           you play outside!" [syn: dirty, soil, begrime, colly,
            bemire] [ant: clean]