Wiktionary
lose one's life
vb. (context euphemistic English) To die, especially to be killed during involvement in an activity or in some other undertaking.
Usage examples of "lose one's life".
From our point of view it is better to lose one's life than lose one's pride.
But having to lose one's life while still rubbing the sleep out of one's eyes was positively barbaric.
It is better to lose one's life than one's spirit, if one is a priest and the son of a priest.