Pass from physical life and lose all bodily attributes and functions necessary to sustain life.

She died from cancer.
The children perished in the fire.
The patient went peacefully.
The old guy kicked the bucket at the age of 102.
buy the farm, cash in one's chips, choke, conk, croak, decease, die, drop dead, exit, expire, give-up the ghost, go, kick the bucket, pass, pass away, perish, pop off, snuff it