köken: Shift from ねぶる (neburu), from the same root with Old Japanese 寝 (nu) (whence 寝る (neru, “to sleep; to lie down”)), in turn from Proto-Japonic *naynpuru. Cognate with Kunigami 眠ん (ninbin /níɴbîɴ/), Northern Amami Ōshima 眠るり (nïbururi), Okinawan 眠じゅん (ninjun /níɴdʑùɴ/), Okinoerabu 眠ゆん (nibuyun /nìbújúɴ/), Southern Amami Ōshima 眠っゆむっ (nïpyum /nɨ́pjùm̩/), 眠りゅむっ (nïpryum /nɨ́pɾʲùm̩/),…