Where does “*tregō” come from?

*tregō (Proto-West Germanic) comes from Proto-Germanic tregô, from Proto-Indo-European dreǵʰ- — to be unwilling, vexed.

Ancestry of “*tregō”, step by step

StepLanguageWordMeaning
1Proto-Germanictregôgrief, pain
2Proto-Indo-Europeandreǵʰ-to be unwilling, vexed

Words derived from “*tregō

Every word from Proto-Indo-European dreǵʰ-Every word from Proto-Germanic tregô