Die by (one's) own hand negative verb phrase
To kill oneself deliberately
Vì áp lực học hành, nhiều học sinh đã tự kết thúc đời mình.
It's so sad to hear that she died by her own hand.
When being devastated and feeling hopeless, I used to want to die by their own hands.
The verb "die" should be conjugated according to its tense.
The police came to the conclusion that the man died by his own hand.
A person who is completely unknown or has no connection with you
The guy I talked to at the prom last night is a perfect stranger.