Died, Passed Away or Passed

Exactly when did the change in terminology occur, what was the reason for the change, is it helpful for the family of the deceased, and what are the theological implications of using "passed away" or "passed" instead of "died"? I decided to explore the matter.
Exactly when did the change in terminology occur, what was the reason for the change, is it helpful for the family of the deceased, and what are the theological implications of using passed away or passed instead of died? I decided to explore the matter.

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Died - 'passed away' or 'passed out'. Which is correct??

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