noun
A mountaineering term for a sharp, narrow ridge resembling a knife blade.
あの山のナイフリッジは上級者向けだ。
That mountain's knife ridge is for advanced climbers.
ナイフリッジを慎重に通過した。
We carefully crossed the knife ridge.
Variant with interpunct; less common but still seen.
痩せ尾根 is a native Japanese term for a narrow ridge, while ナイフリッジ is a loanword specifically emphasizing a sharp, knife-like edge.
Loanword from English 'knife ridge'.