Proto-Sino-Tibetan: *k(r)ēŋ (~g-)
Meaning: vein, thread
Tibetan: rkjaŋ name of a vein.
Burmese: khjañ, khrañ thread, LB *khriŋ.
Comments: Cf. the words for 'root' in some TB languages: Bugun ereŋ, Jirel cab-reŋ, Aka *khrin, Nocte ariŋ, Nung *grVN (although they may reflect some other roots as well).