Where does “dzisiak” come from?

dzisiak (Polish) comes from Polish dzisiaj, from Old Polish dzińsia, from Proto-Slavic dьnьsь, from Proto-Slavic dь̑nь — day.

Ancestry of “dzisiak”, step by step

StepLanguageWordMeaning
1Polishdzisiajtoday
2Old Polishdzińsiatoday
3Proto-Slavicdьnьsьtoday
4Proto-Slavicdь̑nьday
Every word from Proto-Slavic dь̑nь →Every word from Proto-Slavic dьnьsь →Every word from Old Polish dzińsia →