Cf. a related verb *nbl ‘to decay, die’. Cf. Sem. *npl - to fall (e. g. in [HALOT 709]) and such derived forms, probably developed by contamination with the present root, as Hbr. mappälät ‘carcass’ [HALOT 618] (< *ma-npal-t-), Syr. mappultā ‘cadaver’ [LSyr. 847] (< *ma-npul-t-).
with an unexplained loss of -b-
det. nblth