Where does “волочи” come from?

волочи (Old East Slavic) comes from Proto-Slavic velťi, from Proto-Balto-Slavic welk-.

Ancestry of “волочи”, step by step

StepLanguageWordMeaning
1Proto-Slavicvelťito drag
2Proto-Balto-Slavicwelk-—
Every word from Proto-Balto-Slavic welk- →Every word from Proto-Slavic velťi →