Jewish Babylonian Aramaic

šūrā - umbilical cord (DJBA 1124)

Also šrrˀ, cf. DJBA 1182.

PCS
*šurr- - navel; navel string (SED I No. 254; Kogan 2011: 217; Kogan 2015: 198)
possible connection with verbal root *šrr - to be firm, hard