Where does “晦” come from?

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

Ancestry of “晦”, step by step

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

Words derived from “晦”

Every word from Proto-Japonic tuku →Every word from Proto-Japonic tukuy →Every word from Old Japanese 月 →