The only possible trace of this root outside CS can be found in Akk.
ešēbu ‘to grow luxuriantly’. Its relationship to the
Akkadian plant name
išbabtu is considerably less certain because of the peculiar morphological shape of the Akkadian word.
Sab.
ˁs₃bt ‘pastureland’ and Qat.
ˁs₃b ‘crops, produce’,
often compared to this root (Fronzaroli 1968:289), can hardly be related in view
of the phonological irregularity (ESA s₃ does not normally correspond to PS ŝ)
(Kagan 2015: 183)