Where does “biciușor” come from?

biciușor (Romanian) comes from Romanian bici, from Old Church Slavonic бичь, from Proto-Slavic bičь, from Proto-Indo-European bʰiH-ti̯o.

Ancestry of “biciușor”, step by step

StepLanguageWordMeaning
1Romanianbiciwhip, horsewhip, scourge
2Old Church Slavonicбичьwhip
3Proto-Slavicbičьwhip
4Proto-Indo-EuropeanbʰiH-ti̯o—
Every word from Proto-Indo-European bʰiH-ti̯o →Every word from Proto-Slavic bičь →Every word from Old Church Slavonic бичь →