Where does “*ʔnəj¹/³” come from?

*ʔnəj¹/³ (Proto-Lolo-Burmese) comes from Proto-Sino-Tibetan *ku-ni(k) — sun.

Ancestry of “*ʔnəj¹/³”, step by step

Step	Language	Word	Meaning
1	Proto-Sino-Tibetan	*ku-ni(k)	sun