desertion (n.)

1590s, from Middle French désertion (early 15c.), from Late Latin desertionem (nominative desertio) "a forsaking, abandoning," noun of action from past participle stem of Latin deserere "to abandon, to leave, forsake, give up, leave in the lurch," from de- "undo" (see de-) + serere "join together, put in a row" (from PIE root *ser- (2) "to line up").

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