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]