Krombacher Output is a German beer brand, which is produced by the Krombacher Brewery. The beer is a pale lager and has been brewed since 1803. The name of the beer is derived from the Krombach river, which runs through the town of Krombach in North Rhine-Westphalia, Germany. The beer is popular throughout Germany and is exported to many countries around the world. The four letter answer to the crossword puzzle is BIER, which is the German word for beer.