palimpsest (n.)youdaoicibaDictYouDict[palimpsest 词源字典]
"parchment from which earlier writing has been removed to clear it for new writing," 1660s, from Latin palimpsestus, from Greek palimpsestos "scraped again," from palin "again" (see palindrome) + verbal adjective of psen "to rub smooth" (of uncertain origin).[palimpsest etymology, palimpsest origin, 英语词源]