Where does “време” come from?

време (Bulgarian) comes from Church Slavonic врѣмѧ, from Proto-Slavic vermę, from Proto-Slavic vertmen, from Proto-Indo-European wertmen.

Ancestry of “време”, step by step

Step	Language	Word	Meaning
1	Church Slavonic	врѣмѧ	—
2	Proto-Slavic	vermę	time
3	Proto-Slavic	vertmen	—
4	Proto-Indo-European	wertmen	—

време — Etymology, Origin & Word History | Etymology Explorer