PS

*bVnṯ̣ur- - clitoris, vagina (SED I No. 37, Kogan 2011: 219)

Reliable, though attested only in Akk. and Arb. Note a variety of forms in Arb.

Akkadian
biṣṣūru - vulva, female genitals (CAD B 268, AHw. 131)
Arabic
bunḏ̣ur-, bayḏ̣ar-, baḏ̣r-, baḏ̣ar- - clitoris (BK 1 139, Lane 222)
Cf. a variant root baḍr- ‘clitoris feminae quae praecidi solet’ [Freytag I 128] (not in [BK]).