An Etymological Dictionary of the German Language/versöhnen

by Friedrich Kluge

versöhnen (same as versühnen), vb., ‘to reconcile, atone for,’ from the equiv. MidHG. versüenen; allied to Sühne. The accented vowel is derived either from LG. or probably from OBav. and OSwab., in which, late in the Middle Ages, œ appears before n., instead of üe (grön for grün; tön for tün).