Where does “dorschen” come from?

dorschen (Middle Dutch) comes from Old Dutch threscan, from Proto-Germanic þreskaną, from Proto-Indo-European terh₁- — to rub, turn; to drill, pierce.

Ancestry of “dorschen”, step by step

StepLanguageWordMeaning
1Old Dutchthrescanto thresh
2Proto-Germanicþreskanąto thresh
3Proto-Indo-Europeanterh₁-to rub, turn; to drill, pierce
Every word from Proto-Indo-European terh₁- →Every word from Proto-Germanic þreskaną →Every word from Old Dutch threscan →