馬うまの背せ

expression, noun

horse's back

Literal meaning: the back of a horse. Used in contexts of riding or describing the animal.

• 彼かれは馬うまの背せに乗のって草そう原げんを走はしった。

  He rode on the horse's back across the grassland.

expression, noun

mountain ridge; arête; road along a ridge

Figurative use: a narrow mountain ridge or a road running along such a ridge, likened to the shape of a horse's back. Often used in geographical descriptions or hiking contexts.

• 登と山ざん道どうは馬うまの背せのような尾お根ねを進すすむ。

  The trail follows a ridge like a horse's back.

• 馬うまの背せを歩あるくときは足あし元もとに注ちゅう意いしてください。

  Please watch your step when walking along the narrow ridge.