Akkadian

mīru - young bull (CAD M₂ 109, AHw. 658)

Fem. mīrtu ‘cow’ (CAD M₂ 109, AHw. 658).

PS
*mir(Vˀ)- - bull (SED II No. 153)
Hbr. mərī(ˀ) ‘fatted steer’ (KB 635) can be a WS word of this root. See discussion in SED II No. 153.