Where does “こそあど” come from?

こそあど (Japanese) comes from Japanese ど, from Japanese と, from Old Japanese と, from Proto-Japonic tə, from Proto-Uralic tä — that.

こそあど (Japanese): Japanese demonstratives

Definitions

  1. Japanese demonstratives

Ancestry of “こそあど”, step by step

こそあど traces back through 3 separate lines of ancestry.

via Japanese ど

StepLanguageWordMeaning
1Japaneseどsuper-; 度 degree, extent; 努 the third of the...
2Japaneseとwith; and; a particle following a phrase or...
3Old Japaneseと—
4Proto-Japonictəplace
5Proto-Uralictäthat

via Japanese あ

StepLanguageWordMeaning
1Japaneseあexpresses surprise: Ah! Oh!; used to get...
2Japaneseあり有り existing; 蟻 ant

via Japanese こ

StepLanguageWordMeaning
1Japaneseこ此 you; 是 you
Every word from Proto-Uralic tä →Every word from Proto-Japonic tə →Every word from Old Japanese と →