Where does “よ” come from?
よ (Old Japanese) comes from Japanese 夜, from Old Japanese よる, from Proto-Japonic yoru, from Proto-Japonic yo — night.
Ancestry of “よ”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Japanese | 夜 | night, evening |
| 2 | Old Japanese | よる | — |
| 3 | Proto-Japonic | yoru | night |
| 4 | Proto-Japonic | yo | night |