Where does “četvrtfinale” come from?
četvrtfinale (Serbo-Croatian) comes from Proto-Slavic četvьrtъ, from Proto-Balto-Slavic ketwirtas, from Proto-Indo-European *kʷetwr̥tós.
četvrtfinale (Serbo-Croatian): quarter-finals
Ancestry of “četvrtfinale”, step by step