Where does “日日” come from?

日日 (Japanese) comes from Japanese 日, from Old Japanese 日, from Proto-Japonic *pi — day, sun.

日日 (Japanese): day by day; every day, daily; a specific date

Definitions

  1. day by day; every day, daily; a specific date

Ancestry of “日日”, step by step

StepLanguageWordMeaning
1Japanese日Sunday
2Old Japanese日the sun; sunlight, sunshine; daytime, daylight
3Proto-Japonic*piday, sun
Every word from Proto-Japonic *pi →Every word from Old Japanese 日 →Every word from Japanese 日 →
日日 — Etymology, Origin & Word History | Etymology Explorer