köken: From Ancient Greek λαγώς (lagṓs), from λαγωός (lagōós), from Proto-Indo-European *(s)leg- (“to droop, be slack, languid”) in the sense of drooping ears; see also Latin langueō and languidus, Ancient Greek λαγγάζω (langázō, “to slacken”) and λάγνος (lágnos, “lascivious, lustful”).