Where does “отбывать” come from?

отбывать (Russian) comes from Russian отбы́ть, from Russian быть, from Old East Slavic бꙑти, from Proto-Slavic *byti, from Proto-Balto-Slavic bū́ˀtei, from Proto-Indo-European bʰuH- — to become, grow, appear.

отбывать (Russian): to leave

Definitions

  1. to leave

Ancestry of “отбывать”, step by step

StepLanguageWordMeaning
1Russianотбы́тьto depart (from or for)
2Russianбытьto be
3Old East Slavicбꙑтиto be
4Proto-Slavic*byti—
5Proto-Balto-Slavicbū́ˀteito be
6Proto-Indo-EuropeanbʰuH-to become, grow, appear
Every word from Proto-Indo-European bʰuH- →Every word from Proto-Balto-Slavic bū́ˀtei →Every word from Proto-Slavic *byti →