Donor Kra-Dai
Kra-Dai branches contain many non-Sinitic words that are of Sino-Tibetan origin, but these words cannot be traced to any known branch of Sino-Tibetan. Hence, I have posited a "missing" "Donor Kra-Dai" branch.
Words include year, low, younger sibling, thunder, lightning, etc. There are various parallels with rGyalrongic languages.
Linguistic layers