An Etymological Dictionary of the German Language/Annotated/reden

by Friedrich Kluge

reden, verb, ‘to speak, talk, converse,’ from the equivalent Middle High German ręden, Old High German rędiôn, rędôn, also Old High German rędinôn, just as in the case of Old High German rędia the equivalent variant rędina occurs (compare Old Saxon ręðion, ‘to speak’); from this Old High German rędinôn, is derived Old High German rędinâri, Middle High German rędenœre, Modern High German Redner, ‘orator.’