Where does “*kʰwiːᴮ” come from?

*kʰwiːᴮ (Proto-Southwestern Tai) comes from Middle Chinese 騎.

Ancestry of “*kʰwiːᴮ”, step by step

Step	Language	Word	Meaning
1	Middle Chinese	騎	—

*kʰwiːᴮ — Etymology, Origin & Word History | Etymology Explorer