Akkadian

ayāṣu - weasel (CAD A₂ 231, AHw. 25)

Var. ayyaṣu. Also a bag to carry oil, made of the skin of the weasel.

PS
*ˀa(n)yaṣ-, *ˀanṣaw/y- - weasel, mouse (SED II No. 26)