ᴺS. [ᴱN.] ^puch n. “cunnus, vagina” (Category: Womb)
This word appeared ᴱN. huch “cunnus” (Latin = “vagina”) in Early Noldorin Word-lists of the 1920s, derived from primitive ᴱ✶pukku- (PE13/147, 163). Primitive initial [p] often became [h] in (Early) Noldorin.
Neo-Sindarin: Since this sound change was not a feature of later Sindarin, I would adapt this word as ᴺS. puch “cunnus, vagina”, as suggested by Fiona Jallings.
References ✧ PE13/147, 163