apparatus: [17] Etymologically, apparatus is ‘equipment that has been prepared for a particular use’. The word is borrowed from Latin apparātus, the past participle of the compound verb apparāre, formed from the prefix ad- and parāre ‘make ready’ (source of prepare ‘make ready in advance’, and related to parent). At the beginning of the 17th century, the related but anglicized form apparate put in a brief appearance in the language (possibly borrowed from French apparat), but within 20 years apparatus had supplanted it. => parent, prepare
