COMMENT: In PEC there occurred a labial assimilation (*nŭlxV > *mŭlxV); we must reconstruct *n- for PNC, because *mŭlxV would have yielded PWC *PVxV. Although not very widely spread, the root seems safely reconstructable (since the meaning 'asp' is constantly recurring in different subgroups, it may have been the name of the asp-tree).
