A peak, summit, ridge, or the topmost part of a hill or mountain.
私たちは朝早く出発して、山の峰に登った。
We set out early in the morning and climbed to the mountain's summit.
連なる峰が夕日に赤く染まって見えた。
The string of peaks looked red in the sunset.
雪で覆われた峰はたいへん美しかった。
The snow-covered peak was very beautiful.
The back (spine) of a blade — the opposite side of the cutting edge.
包丁の峰を指先で確認して、切れ味を確かめた。
I checked the spine of the kitchen knife with my fingertip to test its sharpness.
職人は刀の峰の形に細心の注意を払う。
Craftsmen pay careful attention to the shape of a blade's spine.
ナイフの峰が曲がっていると使いにくい。
A knife is hard to use if its spine is bent.