PArm

*lāyṯ - there is not (Kogan 2015:399)

The fusion of *lā and *yīṯ(ay) is also attested in Akk. laššu (CAD L 108) and Arb. laysa (Lane 2684).

Old Aramaic
lyš - there is not (DNWSI 576)
Syriac
layt - there is not (LSyr. 366, SL 689)
Mlaḥso
let - es gibt nicht (there is no) (Jastrow 1994:181)