An Etymological Dictionary of the German Language/Annotated/Sod

by Friedrich Kluge

Sod, masculine, usually Sotbrennen, ‘heartburn,’ from the equivalent Middle High German sôt (d), masculine and neuter, which literally means ‘bubbling, boiling,’ a derivative of Middle High German sieden. Hence Modern High German Sod, signifying ‘broth, well,’ as well as the local name Soden.