alp /ˈælp/
  高山
  Alp n.
  1. A very high mountain. Specifically, in the plural, the highest chain of mountains in Europe, containing the lofty mountains of Switzerland, etc.
     Nor breath of vernal air from snowy alp.   --Milton.
     Hills peep o'er hills, and alps on alps arise.   --Pope.
  2. Fig.: Something lofty, or massive, or very hard to be surmounted.
  Note: ☞ The plural form Alps is sometimes used as a singular. “The Alps doth spit.”