scouring
  洗擦;渣滓;人渣
  Scour v. t. [imp. & p. p. Scoured p. pr. & vb. n. Scouring.]
  1. To rub hard with something rough, as sand or Bristol brick, especially for the purpose of cleaning; to clean by friction; to make clean or bright; to cleanse from grease, dirt, etc., as articles of dress.
  2. To purge; as, to scour a horse.
  3. To remove by rubbing or cleansing; to sweep along or off; to carry away or remove, as by a current of water; -- often with off or away.
  [I will] stain my favors in a bloody mask,
  Which, washed away, shall scour my shame with it.   --Shak.
  4.  To pass swiftly over; to brush along; to traverse or search thoroughly; as, to scour the coast.
     Not so when swift Camilla scours the plain.   --Pope.
  5. To cleanse or clear, as by a current of water; to flush.
     If my neighbor ought to scour a ditch.    --Blackstone.
  Scouring barrel, a tumbling barrel. See under Tumbling.
  Scouring cinder Metal., a basic slag, which attacks the lining of a shaft furnace. --Raymond.
  Scouring rush. Bot. See Dutch rush, under Dutch.
  Scouring stock Woolen Manuf., a kind of fulling mill.
  scouring
       n 1: moving over territory to search for something; "scouring the
            entire area revealed nothing"
       2: the act of cleaning a surface by rubbing it with a brush and
          soap and water [syn: scrub, scrubbing]