Where does “ipnopedia” come from?
ipnopedia (Italian) comes from Italian Ipno, from Ancient Greek Ὕπνος, from Proto-Hellenic húpnos, from Proto-Indo-European supnós, from Proto-Indo-European swóp-r̥ ~ swép-n̥s, from Proto-Indo-European swep- — to sleep.
ipnopedia (Italian): hypnopaedia
Ancestry of “ipnopedia”, step by step