Where does “бдительный” come from?
бдительный (Russian) comes from Russian бдеть, from Old East Slavic бъдѣти, from Proto-Slavic bъděti, from Proto-Balto-Slavic budḗˀtei, from Proto-Indo-European bʰewdʰ- — to be awake, be aware.
Ancestry of “бдительный”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Russian | бдеть | to be awake, not sleep; to keep watch, to keep... |
| 2 | Old East Slavic | бъдѣти | to be awake |
| 3 | Proto-Slavic | bъděti | to be awake |
| 4 | Proto-Balto-Slavic | budḗˀtei | to be awake |
| 5 | Proto-Indo-European | bʰewdʰ- | to be awake, be aware |