Where does “ஏது” come from?

ஏது (Tamil) comes from Sanskrit हेतु, from Sanskrit तु, from Sanskrit त्वम्, from Proto-Iranian tuHám, from Proto-Indo-Iranian túH, from Proto-Indo-European túh₂ — you, thou.

ஏது (Tamil): which, what

Definitions

  1. which, what

Ancestry of “ஏது”, step by step

ஏது traces back through two separate lines of ancestry.

via Sanskrit हेतु

StepLanguageWordMeaning
1Sanskritहेतु"impulse", motive, cause, cause of, reason for;...
2Sanskritतुpray, I beg, do; but; and
3Sanskritत्वम्you, thou
4Proto-IraniantuHám—
5Proto-Indo-IraniantúHyou, thou
6Proto-Indo-Europeantúh₂you, thou

via Proto-Turkic yā-

StepLanguageWordMeaning
1Proto-Turkicyā-—
2Proto-Tocharian*iyā-to go, travel
3Proto-Indo-Europeanyeh₂-to go; to go in, enter; to ride, to travel
Every word from Proto-Indo-European túh₂ →Every word from Proto-Indo-Iranian túH →Every word from Proto-Iranian tuHám →