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.