Where does “vakablaka” come from?

vakablaka (Hungarian) comes from Hungarian vakablak, from Hungarian ablak, from Slovak oblok, from Slovak oblý, from Proto-Slavic obьlъ — round.

Ancestry of “vakablaka”, step by step

StepLanguageWordMeaning
1Hungarianvakablakblind window
2Hungarianablakwindow; teller window, ticket window; program...
3Slovakoblokwindow
4Slovakoblýrounded
5Proto-Slavicobьlъround
Every word from Proto-Slavic obьlъ →Every word from Slovak oblý →Every word from Slovak oblok →