This is the 10757th most frequent German word.
rothacher
"Rothacher" is not a standard German word; it might be a proper noun, such as a surname or place name.
In this case, 'rothacher' is used as an adjective describing the type or origin of a grape.
Die rothacher Traube hat einen intensiven Geschmack.
The Rothacher grape has an intense flavor.
Here, 'Rothach' is used as a geographical name of a fictional town, which can be related to the stem 'rothach' while changing meaning based on context.
Wir verbringen diesen Sommer in Rothach, einer ruhigen Stadt in den Alpen.
We are spending this summer in Rothach, a quiet town in the Alps.
Here, 'Rothacher' is used as a proper noun or surname referring to a specific individual likely associated with winemaking.