Drape
mid 19th century: back-formation from drapery, influenced by French draper ‘to drape’. The noun senses date from the early 20th century.
wiktionary
From Middle English drape(“a drape”, noun), from Old French draper(“to drape; to full cloth”), from drap(“cloth, drabcloth”), from Late Latin drappus, drapus(“drabcloth, kerchief”), a word first recorded in the Capitularies of Charlemagne, probably from Frankish*drapi, *drāpi(“that which is fulled, drabcloth”, literally “that which is struck or for striking”) [1], from Proto-Germanic *drapiz(“a strike, hit, blow”) and Proto-Germanic *drēpiz(“intended for striking, to be beaten”), both from *drepaną(“to beat, strike”), from Proto-Indo-European *dʰreb-(“to beat, crush, make or become thick”) [2]. Cognate with English drub(“to beat”), North Frisian dreep(“a blow”), Low German drapen, dräpen(“to strike”), German treffen(“to meet”), Swedish dräpa(“to slay”). More at drub.
etymonline
drape (v.)
c. 1400, drapen, "to ornament with cloth hangings;" mid-15c., "to weave into cloth," from Old French draper "to weave, make cloth" (13c., in Modern French "to cover with mourning-cloth, dress, drape"), from drap "cloth, piece of cloth, sheet, bandage," from Late Latin drapus, which is perhaps of Gaulish origin (compare Old Irish drapih "mantle, garment"). Meaning "to cover with drapery" is from 1847. Meaning "to cause to hang or stretch out loosely or carelessly" is from 1943. Related: Draped; draping.
drape (n.)
1660s, "cloth, drapery," from drape (v.). Jive talk slang for "suit of clothes" is attested from 1945. Drapes "curtains" is by 1895.
