Where does “ตอนใด” come from?

ตอนใด (Isan) comes from Thai ใด, from Proto-Tai ɗaɰᴬ — which.

ตอนใด (Isan): when

Definitions

  1. when

Ancestry of “ตอนใด”, step by step

ตอนใด traces back through two separate lines of ancestry.

via Thai ใด

StepLanguageWordMeaning
1Thaiใดany; which
2Proto-Taiɗaɰᴬwhich

via Thai ตอน

StepLanguageWordMeaning
1Thaiตอนinterval; period of time; portion; part; section;...
2Proto-Taitoːnᴬto castrate
Every word from Proto-Tai ɗaɰᴬ →Every word from Thai ใด →