give that boy a cookie!
here's what etymonline.com had to say:
preparation
1390, "act of preparing," from L. pręparationem (nom. pręparatio) "a making ready," from pręparatus, pp. of pręparare "prepare," from prę- "before" + parare "make ready" (see pare). Meaning "a substance especially prepared" is from 1646. Verb prepare is attested from 1466, from M.Fr. preparer, from L. pręparare; slang shortening prep is from 1927. Preparatory is first recorded 1413, from L.L. pręparatorius, from L. pręparatus. Applied from 1822 to junior schools in which pupils are "prepared" for a higher school.but if you really want to get into it, go here:
http://www.etymonline.com/index.php?searchmode=none&search=parepare is something else! seems to be a root of just about everything.
welcome florence!