Where does “bjusti” come from?

bjusti (Proto-Slavic) comes from Proto-Balto-Slavic bjaustei, from Proto-Indo-European bʰéwdʰeti, from Proto-Indo-European bʰewdʰ- — to be awake, be aware.

Ancestry of “bjusti”, step by step

StepLanguageWordMeaning
1Proto-Balto-Slavicbjausteito watch
2Proto-Indo-Europeanbʰéwdʰetito be awake, aware
3Proto-Indo-Europeanbʰewdʰ-to be awake, be aware
Every word from Proto-Indo-European bʰewdʰ- →Every word from Proto-Indo-European bʰéwdʰeti →Every word from Proto-Balto-Slavic bjaustei →