足そっ骨こつ

noun

bones of the feet; foot bones

Only with reading そっこつ

Rare anatomical term; in everyday language, 足の骨 is more common.

• 足そっ骨こつの構こう造ぞうは複ふく雑ざつだ。

  The structure of the foot bones is complex.

noun

strength of one's feet; foot strength

Only with reading あしぼね

Rare, old-fashioned expression; modern Japanese would more often use 足の力 or 脚力.

• 昔むかしの人ひとは足あし骨ぼねが強つよかったと言いわれる。

  It is said that people in the old days had strong feet.