Akkadian

nâḳu - to cry, to groan (CAD N₁ 341, AHw. 744)

Ass. nuāḳu.
Cf. tanūḳātu (pl. t.) ‘Kampfgeschrei’ (AHw. 1320).

PS
*nhḳ - to bray (of donkey); cry, groan; roar (SED I No. 44v)