Preparation

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late Middle English: via Old French from Latin praeparatio(n- ), from praeparare ‘make ready before’ (see prepare).

wiktionary

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Borrowed from Middle French préparation, from Latin praeparatio, praeparationem. Morphologically prepare +‎ -ation

etymonline

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preparation (n.)

late 14c., preparacioun, "act of preparing or making ready, preliminary act or operation, a previous setting in order," from Old French preparacion (13c.) and directly from Latin praeparationem (nominative praeparatio) "a making ready," noun of action from past participle stem of praeparare "prepare," from prae "before" (see pre-) + parare "make ready" (from PIE root *pere- (1) "to produce, procure"). Meaning "a substance especially prepared or manufactured" is from 1640s.