Where does “détidu” come from?

détidu (Old Irish) comes from Old Irish dét, from Proto-Celtic *dant, from Proto-Indo-European h₃dónts, from Proto-Indo-European h₁ed- — to eat.

Ancestry of “détidu”, step by step

StepLanguageWordMeaning
1Old Irishdéttooth; set of teeth; of ivory
2Proto-Celtic*danttooth
3Proto-Indo-Europeanh₃dóntstooth
4Proto-Indo-Europeanh₁ed-to eat
Every word from Proto-Indo-European h₁ed- →Every word from Proto-Indo-European h₃dónts →Every word from Proto-Celtic *dant →