Where does “бдеть” come from?

бдеть (Russian) comes from Old East Slavic бъдѣти, from Proto-Slavic bъděti, from Proto-Balto-Slavic budḗˀtei, from Proto-Indo-European bʰewdʰ- — to be awake, be aware.

бдеть (Russian): to be awake, not sleep; to keep watch, to keep...

Definitions

to be awake, not sleep; to keep watch, to keep...

Ancestry of “бдеть”, step by step

Step	Language	Word	Meaning
1	Old East Slavic	бъдѣти	to be awake
2	Proto-Slavic	bъděti	to be awake
3	Proto-Balto-Slavic	budḗˀtei	to be awake
4	Proto-Indo-European	bʰewdʰ-	to be awake, be aware

Words derived from “бдеть”

бдительный
бди́тельный
бдительность

Every word from Proto-Indo-European bʰewdʰ- →Every word from Proto-Balto-Slavic budḗˀtei →Every word from Proto-Slavic bъděti →