TgO Num5:22 :לְאַפָחָא מְעִין וֻלאַמסָאָה יִרַך‏ : to inflate the innards and melt a buttocks
See the entire entry for msy vb. to melt, rot

TgO Num5:22 :לְאַפָחָא מְעִין‏ :
See the entire entry for npḥ vb. to blow