prepare (v.) Look up prepare at Dictionary.com
mid-15c., a back formation from preparation and in part from Middle French preparer (14c.), from Latin praeparare "make ready beforehand," from prae "before" (see pre-) + parare "make ready" (from PIE root *pere- (1) "to produce, procure"). Related: Prepared; preparing. Be prepared as the Boy Scouts' motto is attested from 1911.