Where does “tosk” come from?

tosk (Old Frisian) comes from Proto-Germanic tunþskaz, from Proto-Germanic tanþs, from Proto-Indo-European h₃dónts, from Proto-Indo-European h₁ed- — to eat.

Ancestry of “tosk”, step by step

StepLanguageWordMeaning
1Proto-Germanictunþskaztooth; tusk
2Proto-Germanictanþstooth
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-Germanic tanþs →