ra·vine /rəˈvin/
  峽谷,山峽,谿谷
  Rav·en, v. i. To prey with rapacity; to be greedy; to show rapacity. [Written also ravin, and ravine.]
     Benjamin shall raven as a wolf.   --Gen. xlix. 27.
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  Rav·en n.  [Written also ravin, and ravine.]
  1. Rapine; rapacity.
  2. Prey; plunder; food obtained by violence.
  Rav·in, Rav·ine  n.  Food obtained by violence; plunder; prey; raven. “Fowls of ravyne.”
  Though Nature, red in tooth and claw
  With ravine, shrieked against his creed.   --Tennyson.
  Rav·in, Rav·ine, v. t. & i. See Raven, v. t. & i.
  Ra·vine n.
  1. A torrent of water. [Obs.]
  2. A deep and narrow hollow, usually worn by a stream or torrent of water; a gorge; a mountain cleft.
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  ravine
       n : a deep narrow steep-sided valley (especially one formed by
           running water)