sentences:  The latter one is the common placename ending "—bach", meaning “brook” in German.The former one derives from "grun", "gruon", a form of the Middle High German "gruone" cropping up mainly in central Germany, a derivative of inchoative character from Old High German "gruoni".This stems from the Proto-Indo-European root "*ghro-", "*ghre-", meaning “sprout” or “grow” (and indeed the English word “grow” springs from the same Proto-Indo-European root).