chaperon: [14] A chaperon was originally a ‘hood’. The word comes from Old French chaperon, a derivative of chape, whose variant cape was the source of English cape, and goes back ultimately to late Latin cappa ‘hood, cloak’. The word’s modern sense, ‘companion safeguarding propriety’, which first appears in English in the 18th century, arose from the general notion of a ‘hood’ as something that gives protection. => cape
