Arabic

ǯašš- - milieu du dos, vertèbres (d'une bête de somme) (middle of the back, chine) (BK 1 295)

PS
*giŝŝ- - torso, body (SED I No. 97)
The protoform *giŝŝ- is supported by Akk., Arm., Arb. Daṯ. and presumably MSA.