Comments:A Turko-Mongolian isogloss. One is tempted to suppose lost *p`- and to unite this root with TM *pemu-, Jpn. *pàm- (see *pĕ̀ma). This is, however, hardly possible, because both Middle Mongolian and Dagur have 0- here (while Mongor x- can easily be secondary in front of a voiceless stop). A possible solution would be a loss of *h- ( < *p`-) in Proto-Mongolian (or even Proto-Turko-Mongolian) under the influence of a phonetically close "nursery" word, *ĕ̀me 'mother, female' q. v.