Where does “夜中” come from?

夜中 (Japanese) comes from Japanese 夜, from Old Japanese よる, from Proto-Japonic yoru, from Proto-Japonic yo — night.

夜中 (Japanese): late at night, the middle of the night; midnight;...

Definitions

  1. late at night, the middle of the night; midnight;...

Ancestry of “夜中”, step by step

夜中 traces back through 3 separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japanesenight, evening
2Old Japaneseよる
3Proto-Japonicyorunight
4Proto-Japonicyonight

via Japanese

StepLanguageWordMeaning
1Japanesemiddle, medium; average; neither good nor poor;...
2Japanese中今the present, as a privileged moment in eternity
3Japanesenow; just now; soon

via Middle Chinese 夜中

StepLanguageWordMeaning
1Middle Chinese夜中
Every word from Proto-Japonic yoEvery word from Proto-Japonic yoruEvery word from Old Japanese よる