departed, die
逝 centers on the final departure of life: dying or passing away. The idea of being departed is a natural extension of that final journey.
逝 combines 辶 (movement) with 折, which likely contributes the sound and the idea of breaking or departing. Together they suggest a final departure or passing away.
The movement radical 辶 wraps around 折, like a journey that breaks away from life. Picture a path leading away, with the inner part snapping shut behind: the final departure of death.
For セイ, imagine a soul departing with a quiet sigh: say -> セイ, as the last breath leaves the body.
to die; to pass away
death; passing
sudden death; unexpected death
Sugata (the well-gone; epithet of Buddha)
premature death
death; dying
death (of a nobleman)
exceptionally ugly man
going afar
death; passing
things going contrary to one's wishes