Where does “пяцьдзесят” come from?
пяцьдзесят (Belarusian) comes from Belarusian дзесяць, from Proto-Slavic desętь, from Proto-Balto-Slavic *déśimt, from Proto-Indo-European déḱm̥t — ten.
пяцьдзесят (Belarusian): fifty
Ancestry of “пяцьдзесят”, step by step