From Old High German kōlo.
Kohl m (genitive Kohls or Kohles, plural Kohle)
- cabbage (plant of the genus Brassica)
Unclear. Several possibilities have been suggested, including derivation from Romani and derivation from Hebrew קוֹל.
Kohl m (genitive Kohls or Kohles, no plural)
- nonsense; idiocy; foolishness