Where does “ärthjärna” come from?

ärthjärna (Swedish) comes from Swedish ärta, from Swedish ärt, from Old Swedish art, from Middle Low German art, from Old Saxon *ard, from Proto-Germanic ardiz, from Proto-Indo-European h₂erh₃-, from Proto-Indo-European h₁er- — earth.

ärthjärna (Swedish): a peabrain (stupid person)

Definitions

  1. a peabrain (stupid person)

Ancestry of “ärthjärna”, step by step

ärthjärna traces back through two separate lines of ancestry.

via Swedish ärta

StepLanguageWordMeaning
1Swedishärtapea; edible seed
2SwedishärtAny species in the Fabacea family; Plant of such...
3Old Swedishart
4Middle Low Germanart
5Old Saxon*ard
6Proto-Germanicardizcharacteristic; inborn quality; nature;...
7Proto-Indo-Europeanh₂erh₃-to plough
8Proto-Indo-Europeanh₁er-earth

via Swedish hjärna

StepLanguageWordMeaning
1Swedishhjärnaa brain; a brain; someone who provides the...
2Old Norsehjarnithe brain
3Proto-Germanichersôcrown of head
4Proto-Indo-Europeanḱerh₂s-head; hornet
5Proto-Indo-Europeanḱerh₂-head, top; horn
Every word from Proto-Indo-European h₁er-Every word from Proto-Indo-European h₂erh₃-Every word from Proto-Germanic ardiz