Where does “grottendumm” come from?

grottendumm (German) comes from German dumm, from Middle High German tump, from Old High German tumb, from Proto-West Germanic dumb, from Proto-Germanic dumbaz, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

grottendumm (German): very dumb

Definitions

  1. very dumb

Ancestry of “grottendumm”, step by step

StepLanguageWordMeaning
1Germandummdumb, stupid
2Middle High Germantump—
3Old High Germantumbdumb; stupid
4Proto-West Germanicdumbdumb, mute
5Proto-Germanicdumbazdumb, mute, unable to speak
6Proto-Indo-Europeandʰewbʰ-deep
7Proto-Indo-Europeandʰewh₂-smoke; mist, haze
Every word from Proto-Indo-European dʰewh₂- →Every word from Proto-Indo-European dʰewbʰ- →Every word from Proto-Germanic dumbaz →