The difficulties are as follows: 1) the gemination of r may not be marked; 2) n is to be explained either as a suffix or as a result of dissimilation from *mVrār-at-. In any case, the meaning is a decisive argument for relating the Tgr. form to the present root.
Most Sem. forms with a reduplicated second radical may be derived after various deverbal paterns from *mrr ‘to be bitter’. However, the fact that besides nominal forms meaning ‘bile, gall, gall-bladder’, there are also terms throughout Sem. meaning only ‘gall-bladder’, and even ‘bladder’ (in Gur). and ‘stomach’ (in Soq.), makes one doubt that this anatomical term derived from the verb ‘to be bitter’; a contamination with this verb (especially in case of Arm. and Hbr. pB. ‘poison’) is very likely.