Where does “riuschen” come from?

riuschen (Middle High German) comes from Old High German rūskōn, from Proto-Germanic rūskōną, from Proto-Indo-European *Hrews-.

Ancestry of “riuschen”, step by step

StepLanguageWordMeaning
1Old High Germanrūskōn—
2Proto-Germanicrūskōnąto make a noise; whiz; whirr; to startle
3Proto-Indo-European*Hrews-—
Every word from Proto-Indo-European *Hrews- →Every word from Proto-Germanic rūskōną →Every word from Old High German rūskōn →