土ど性しょう骨ぼね

noun

innate character; spirit; backbone

Refers to a person's deep-rooted nature, moral fiber, or resilience. Often used in expressions like 土性骨が曲がっている (to be crooked by nature) or 土性骨が据わっている (to have a firm character).

• 彼かれは土ど性しょう骨ぼねが曲まがっているから、何なにを言いっても無む駄だだ。

  He's crooked by nature, so it's no use saying anything to him.

• あの人ひとは土ど性しょう骨ぼねが据すわっていて、どんな困こん難なんにも動どうじない。

  That person has a firm character and is unshaken by any hardship.