Where does “喉” come from?

喉 (Chinese) comes from Proto-Sino-Tibetan ku — neck; throat; to take up; to lift; to prop up.

Ancestry of “喉”, step by step

Step	Language	Word	Meaning
1	Proto-Sino-Tibetan	ku	neck; throat; to take up; to lift; to prop up

喉 — Etymology, Origin & Word History | Etymology Explorer