He died a violent death. 他死于非命。
My grandmother died a natural death (= did not die of illness or because she was killed), as she would have wanted. 我祖母寿终正寝，这是她所希望的结局。
It was assumed that he had died a natural death but DNA evidence now suggests otherwise.
She lived to an old age and died a natural death.
By studying his bones, they worked out that he had died a violent death.
That's how many people die a violent death from homicide or suicide.
See also: die verb