Mountaineer /(moun`tĭn*ēr")/

Moun·tain·eer

Mountaineer

n.
  1. An inhabitant of a mountain; one who lives among mountains.
  2. A rude, fierce person. [Obs.]
    No savage fierce, bandit, or mountaineer.
  3. A person who climbs mountains for sport.

mountaineer

v. i.
  1. To live or act as a mountaineer; to climb mountains.
    You can't go mountaineering in a flat country.