#1632 PTB *r-ku ⪤ *kru NEST / UTERUS / AMNIOTIC SAC

This root is set up on slender but rather convincing evidence, if we are willing to admit relationship via metathesis between Angami forms with kr‑, and Qiangic forms with ɹaq‑. (For another etymon that shows a similar metathesis of prefixal and medial ‑r‑, cf. #1733 PTB *r/m‑bu ⪤ *pru NEST / WOMB / PLACENTA, above. The semantic scope of the Qiangic forms extends to AMNIOTIC SAC. In many TB languages, as in English, the amniotic fluid is referred to simply by the word for WATER (cf. Eng. “Her water broke”), e.g. Maru ɣək³¹ ‘water; amniotic fluid’ (< #1013 PTB *rəy WATER / LIQUID / BODILY FLUID, below), Baima ʃuɛ³⁵ ‘amniotic fluid’ (< Chinese; cf. Mand. 水 shuǐ ‘water’).