Where does “คบไฟ” come from?

คบไฟ (Thai) comes from Thai ไฟ, from Proto-Tai wɤjᴬ — fire.

คบไฟ (Thai): torch

Definitions

Step	Language	Word	Meaning
1	Thai	ไฟ	fire; flame; light; light source; electricity
2	Proto-Tai	wɤjᴬ	fire

คบไฟ — Etymology, Origin & Word History | Etymology Explorer