by one's own hand

Prepositional phrase

idiomatic

(idiomatic) As a result of one's own actions, especially with reference to death by suicide.

Japanese Meaning

自らの行動の結果として生じた（特に自殺による場合に用いられる） / 自分自身の手によって（＝自らの行動に起因して）

In the journal, she wrote about how, driven by despair, one could die by one's own hand.

日記には、絶望に駆られると、人は自ら命を絶つことがあると彼女は書いていた。

Sense（1）

(idiomatic) As a result of one's own actions, especially with reference to death by suicide.

Like too many deeply depressed people, she died by her own hand.