preparation (n.)
late 14c., "act of preparing," 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" is from 1640s.