Akkadian

ulālu - weakling (CAD U–W 69, AHw. 1407)

PS
*hll - to be imbecile, weak-minded, mad; be mocked at (SED I No. 19ᵥ)
Originally rather a biconsonantal stem. Note various ways of triconsonantization in Eth. and a full reduplication in Arb. and Soq.