Departure

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late Middle English: from Old French departeure, from the verb departir (see depart).

wiktionary

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From Old French deporteure(“departure; figuratively, death”).

etymonline

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departure (n.)

mid-15c., "act of going away," also "deviation, divergence, a turning away," from Old French departeure "departure," figuratively, "death, act or fact of leaving the present life," from departir (see depart) + -ure (see -ure).