Where does “大晦” come from?

大晦 (Japanese) comes from Chinese 晦, from Japanese 月隠り, from Japanese 月, from Old Japanese 月, from Proto-Japonic tukuy, from Proto-Japonic tuku.

大晦 (Japanese): the last day of the year, New Year's Eve

Definitions

  1. the last day of the year, New Year's Eve

Ancestry of “大晦”, step by step

大晦 traces back through two separate lines of ancestry.

via Chinese

StepLanguageWordMeaning
1Chinese
2Japanese月隠りthe last day of a (lunar) month
3Japanesethe moon; a natural satellite; moonlight,...
4Old Japanesethe moon; a month; a menstrual cycle,...
5Proto-Japonictukuymoon
6Proto-Japonictuku

via Japanese

StepLanguageWordMeaning
1Japanesebig, large; the large part of; arch-
2Old Japanesebig, large; large
3Proto-Japonicəpəbig, large; many
Every word from Proto-Japonic tukuEvery word from Proto-Japonic tukuyEvery word from Old Japanese