An Etymological Dictionary of the German Language/Annotated/rösche
Appearance
rösche, adjective, ‘prompt, lively, alert, fresh,’ an Upper German word (Bavarian and Swiss rœ̂š, ‘lively, precipitons, harsh’), from Middle High German rôsch, rœsche, Old High German rôsc, rôsci, ‘nimble, hasty, fresh’; cognate terms from which we may infer the primary form (Gothic rausqa-?) are entirely wanting. The connection of the word with rasch is uncertain.