Arabic

šafallāḥ- - natural female parts of body, highly developed and thick; woman whose vagina is very ample, thick; man who has big buttocks, or thick lips (BK I 1250)

Arb. š­ (< *ŝ // *ĉ) poses a problem: it can be from *š // *s influenced by ­l; alternatively *ŝx // *ŝ may be reconstructed in the protoform. 

PCS
*šalpūḥ(-at)- - bladder, inflated organ (SED I No. 245)

Only C. Sem. Semantically somewhat vague; note metathetic relations between the forms quoted.