Where does “þrexan” come from?

þrexan (Old English) comes from Proto-Germanic þreskaną, from Proto-Indo-European terh₁- — to rub, turn; to drill, pierce.

Ancestry of “þrexan”, step by step

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