Where does “Thesmophoria” come from?

Thesmophoria (English) comes from Ancient Greek Θεσμοφόρια, from Ancient Greek -φόρος, from Ancient Greek φέρω, from Proto-Hellenic pʰérō, from Proto-Indo-European bʰéreti, from Proto-Indo-European bʰēr- — shiny, light brown.

Thesmophoria (English): An Ancient Greek festival in honour of Demeter and Persephone, and involving the sacrifice of pigs

Definitions

An Ancient Greek festival in honour of Demeter and Persephone, and involving the sacrifice of pigs

Ancestry of “Thesmophoria”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Θεσμοφόρια	the Thesmophoria
2	Ancient Greek	-φόρος	-bearing, -carrying; carrying, bearing; bringing
3	Ancient Greek	φέρω	I bring, bear, carry
4	Proto-Hellenic	pʰérō	to bear
5	Proto-Indo-European	bʰéreti	to be carrying
6	Proto-Indo-European	bʰēr-	shiny, light brown

Every word from Proto-Indo-European bʰēr- →Every word from Proto-Indo-European bʰéreti →Every word from Proto-Hellenic pʰérō →