am·or·tize /ˈæmɚ/
  (vt.)攤還,攤銷,分期償還,緩衝
  A·mor·tize v. t. .
  1. To make as if dead; to destroy. [Obs.]
  2. Law To alienate in mortmain, that is, to convey to a corporation. See Mortmain.
  3. To clear off or extinguish, as a debt, usually by means of a sinking fund.
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  amortize
       v : liquidate gradually [syn: amortise]