Semantically rather uncertain, a connection with either Akk.
urnu ‘a snake’ or Akk.
mīrānu ‘young dog, puppy’ is not to be ruled out (cf. SED II No.8), but there is no reason to assume an Akkadian loanword in any of the two cases (Kogan 2015: 360).
The word is extensively discussed in Aartun 1983. Cf. also DRS 26.