Yap.Town

de son propre chef

of one's own accord

→ de
phrase Rare #42,386
of one's own accord The possessive changes to match the person: de mon propre chef, de ton propre chef, de leur propre chef, and so on.
FR: Elle a décidé de partir de son propre chef.
EN: She decided to leave of her own accord.

Sun Jun a agi de son propre chef, par rancune à l'égard de ses supérieurs.

Sun Jun acted on his own, out of resentment toward his superiors.

— Full River Red (2023)

Il a avoué le crime de son propre chef.

He confessed to the crime on his own.

Elle agit de son propre chef.

She is acting on her own initiative.

Il agit de son propre chef.

He is acting on his own initiative.