アイゼン

noun

crampons; climbing irons

Metal spikes attached to boots for walking on ice or hard snow; used in mountaineering and winter hiking.

from German Eisen

• 冬ふゆ山やま登と山ざんにはアイゼンが必ひつ要ようだ。

  Crampons are necessary for winter mountain climbing.

• アイゼンを装そう着ちゃくして氷こおりの斜しゃ面めんを登のぼった。

  We put on crampons and climbed the icy slope.