Where does “一日” come from?

一日 (Japanese) comes from Japanese 月, from Old Japanese 月, from Proto-Japonic tukuy, from Proto-Japonic tuku.

一日 (Japanese): the first day of the month; one day, 24 hours;...

Definitions

  1. the first day of the month; one day, 24 hours;...

Ancestry of “一日”, step by step

一日 traces back through 3 separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japanesethe moon; a natural satellite; moonlight,...
2Old Japanesethe moon; a month; a menstrual cycle,...
3Proto-Japonictukuymoon
4Proto-Japonictuku

via Japanese 立ち

StepLanguageWordMeaning
1Japanese立ちstanding, standing up; standing; starting,...
2Japanese立つto stand, to stand up, to rise; to depart; to...
3Proto-Japonictatu

via Middle Chinese 一日

StepLanguageWordMeaning
1Middle Chinese一日

Words derived from “一日

Every word from Proto-Japonic tukuEvery word from Proto-Japonic tukuyEvery word from Old Japanese