自分の意志で

of one's own will

→ 自分
phrase Rare #38,487
of one's own will Used when someone does something voluntarily or by personal choice, rather than being forced or influenced by someone else.
JA: 私は自分の意志でこの仕事を辞めました。
EN: I quit this job of my own will.

彼女は自分の意志で彼と結婚したのではない

She didn't marry him of her own free will.

相手は自分の意志で選びたいと思っている

They want to make their own choice.

自分の意志でここに来た

Did you come here of your own free will?

制御すればいいんだみたいに衝動を殺せば自分の意志で生きられる

You just have to control it. If you suppress your impulses like I did, you can live by your own will.

— ブゴニア (2025)