Proto-Sino-Tibetan: *khrǝ̄w ( ~ gh-, qh-, Gh-)
Meaning: shell, bark
Tibetan: sgro the bark of a species of willow, gro-ga (W.) thin bark of the birch-tree.
Kachin: šǝgrau2 outer skin, as of fruit.
Lepcha: krju, a-krju the slough of a snake, the skin of a bird, the scurf, skin, epidermis
Comments: Ben. 39. Gong 80 compares Tibetan forms with OCh. 樺 *w_rā(k)s a k. of birch. Some TB languages reflect a more archaic shape *KVr, cf.: Bodo-Garo *guʔr / *ku(ʔ)r, Konyak (Chang) khôn, Nocte akhuon, Tangkul akor, Puiron gor.
