This is the 10799th most frequent German word.
rutte
The word "rutte" is not a standard German word.
'Rutte' is used here as a noun referring to a branch or cane in some dialects.
Ich habe eine alte Rutte gefunden.
I found an old cane.
'Rutte' symbolizes a teaching aid in this context, branching from the dialectal root.
Der Lehrer benutzt eine Rutte als Zeigestock.
The teacher uses a pointer as a teaching stick.
Here, 'Rutte' is interpreted as a regional vocabulary representing a natural waterway.