Where does “*ɣɔːᴬ²” come from?

*ɣɔːᴬ² (Proto-Southwestern Tai) comes from Proto-Tai ɣoːᴬ, from Middle Chinese 喉.

Ancestry of “*ɣɔːᴬ²”, step by step

Step	Language	Word	Meaning
1	Proto-Tai	ɣoːᴬ	neck
2	Middle Chinese	喉	—