Where does “tvorъ” come from?

tvorъ (Proto-Slavic) comes from Proto-Balto-Slavic twor(ʔ)-o, from Proto-Indo-European tworH-o-.

tvorъ (Proto-Slavic): creation, creature

Definitions

Step	Language	Word	Meaning
1	Proto-Balto-Slavic	twor(ʔ)-o	—
2	Proto-Indo-European	tworH-o-	—

tvorъ — Etymology, Origin & Word History | Etymology Explorer