Where does “дѧтелъ” come from?
дѧтелъ (Old Church Slavonic) comes from Proto-Slavic dętelъ, from Proto-Balto-Slavic delbtelas, from Proto-Indo-European dʰelbʰ-tel-o-s, from Proto-Indo-European dʰelbʰ- — to dig, excavate.
Ancestry of “дѧтелъ”, step by step