Where does “Dummhirn” come from?

Dummhirn (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.

Dummhirn (German): idiot

Definitions

  1. idiot

Ancestry of “Dummhirn”, step by step

Dummhirn traces back through two separate lines of ancestry.

via German dumm

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

via German Hirn

StepLanguageWordMeaning
1GermanHirnbrain
2Middle High Germanhirne—
3Old High Germanhirnibrain
4Proto-West Germanic*hirʀnībrain
Every word from Proto-Indo-European dʰewh₂- →Every word from Proto-Indo-European dʰewbʰ- →Every word from Proto-Germanic dumbaz →
Dummhirn — Etymology, Origin & Word History | Etymology Explorer