腹はらをくくる

expression, godan verb (-ru)

prepare for the worst; steel oneself; accept one's fate

Idiomatic expression meaning to mentally prepare for a difficult or unavoidable outcome, often with a sense of resolve or resignation. Used when facing a challenge, risk, or inevitable hardship.

• 試し験けんに落おちるかもしれないが、もう腹はらをくくった。

  I might fail the exam, but I've already prepared myself for the worst.

• 彼かれは腹はらをくくって、会かい社しゃを辞やめる決けっ心しんをした。

  He steeled himself and made up his mind to quit the company.