Akkadian

durāˀu - arm, foreleg (CAD D 190, AHw. 177)

d­ instead of the expected z­ suggests a borrowing from Arm.; in this case -­u of the first syllable would reflect early Arm. *-­, the vocalism possibly confirmed by the Amarna form  (SED I No. 65, Abraham–Sokoloff 2011:29).

PWS
*ḏirāˁ- - arm, elbow (SED I 65, Kogan 2011: 224)
The traditional derivation from *ḏrˁ ‘to sow’ (Fronzaroli 1964:34, 48 and 1969:9) is difficult to prove