Sauer

Sauer is a German word meaning sour or acidic, used as an adjective in a variety of contexts, including culinary terms and chemistry. The modern form derives from Old High German sūri and is cognate with related Germanic words for sourness; in everyday language it appears in phrases such as sauer in German dishes and expressions describing tanginess.

The Sauer, known in Luxembourg as the Our, is a river in western Europe. It rises in the Eifel region of Germany, flows through Rhineland-Palatinate and the Grand Duchy of Luxembourg, and is a left tributary of the Moselle. The river has historically served as part of the Luxembourg–Germany border and passes through several towns before joining the Moselle.

Sauer is also a common German surname. It originated as a descriptive nickname for a person with a sour or tart disposition, or as an identifier for someone from a place associated with the word. The name is widespread in German-speaking countries and among descendants of German emigrants, with numerous individuals bearing the surname in various fields.

In industrial history, J. P. Sauer & Sohn was a German firearms manufacturer based in Suhl. Founded in the 18th century, it became part of the SIG Sauer group through later corporate developments. The Sauer name continues to appear in historical branding and in certain product lines within the broader SIG Sauer portfolio.