PS

*ˀnš - (to be) weak (Kogan 2015: 444)

PES
*nˀs/*ˀns - (to be) small (Kogan 2015: 444)

Akkadian
enēšu - to be weak, impoverished, shaky (CAD E 166, AHw. 217)
Hebrew
ˀnš - to be sickly (HALOT 73)