Arabic

sinsinat- - camel hump summit (BK 1 1151)

Note a reduplicated stem and suffixed -m.

Areal reconstruction
*š/sVn(-ām)- - hump of animal (camel, etc.) (SED I No. 250)

Problematic. Scarce attestation in the South Semitic area only; quality of the first radical unspecified.