きしんじゃう
軋んじゃう
kishinja u

Godan Verb (mu)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of きしむ

1. To grind/mill (something) up; To crush; To be ground/crushed; To regret (doing something)

Completed Action
Colloquial
Usually Written in Kana