An Etymological Dictionary of the German Language/Pfropfen

by Friedrich Kluge

Pfropfen, m., ‘stopper, cork’ (first recorded in the last cent.); its form is based on the equiv. LG. propp, Du. prop, ‘plug, cork, stopper’; allied to E. prop. The cognates cannot be derived from Lat. proponere; they are more probably connected with the following group of words.