Where does “четырёхдневный” come from?

четырёхдневный (Russian) comes from Russian день, from Old East Slavic дьнь, from Proto-Slavic dь̑nь — day.

четырёхдневный (Russian): four-day

Definitions

  1. four-day

Ancestry of “четырёхдневный”, step by step

StepLanguageWordMeaning
1Russianденьday, daytime; afternoon, early evening;...
2Old East Slavicдьньday
3Proto-Slavicdь̑nьday
Every word from Proto-Slavic dь̑nь →Every word from Old East Slavic дьнь →Every word from Russian день →