Oder (a major river in the Czech Republic, Poland and Germany)
eş: beziehungsweise, vielmehr, besser gesagt, respektive, mit anderen Worten, das heißt
köken: From Middle High German Odere, from Old High German Odera (in Latin texts; also attested as Oddara and various other forms). Further origin unknown, but usually considered Indo-European. Udolph connects it with Avestan 𐬀𐬛𐬎 (adu, “watercourse”), which is ultimately from Proto-Indo-European *wódr̥ (“water”), and further with various eastern European hydronyms (including the Odra in Croatia, the…