lar·i·at /ˈlæriət, ˈlɛr-/
  套索(vt.)□套索捉
  Lar·i·at n.  A long, slender rope made of hemp or strips of hide, esp. one with a noose; -- used as a lasso for catching cattle, horses, etc., and for picketing a horse so that he can graze without wandering. [Mexico & Western U.S.]
  Lar·i·at v. t. [imp. & p. p. Lariated; p. pr. & vb. n. Lariating.] To secure with a lariat fastened to a stake, as a horse or mule for grazing; also, to lasso or catch with a lariat. [Western U.S.]
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  lariat
       n : a long noosed rope used to catch animals [syn: lasso, riata,
            reata]