Where does “četvьrtъkъ” come from?
četvьrtъkъ (Proto-Slavic) comes from Proto-Slavic četvьrtъ, from Proto-Balto-Slavic ketwirtas, from Proto-Indo-European *kʷetwr̥tós.
četvьrtъkъ (Proto-Slavic): Thursday
Ancestry of “četvьrtъkъ”, step by step
Words derived from “četvьrtъkъ”