Where does “*sum” come from?

*sum (Proto-Tibeto-Burman) comes from Proto-Sino-Tibetan *kV-sum — three.

Ancestry of “*sum”, step by step

StepLanguageWordMeaning
1Proto-Sino-Tibetan*kV-sumthree

Words derived from “*sum

Every word from Proto-Sino-Tibetan *kV-sum
*sum — Etymology, Origin & Word History | Etymology Explorer