Where does “hönshjärna” come from?

hönshjärna (Swedish) comes from Swedish hjärna, from Old Norse hjarni, from Proto-Germanic hersô, from Proto-Indo-European ḱerh₂s-, from Proto-Indo-European ḱerh₂- — head, top; horn.

hönshjärna (Swedish): birdbrain

Definitions

  1. birdbrain

Ancestry of “hönshjärna”, step by step

hönshjärna traces back through two separate lines of ancestry.

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

via Swedish höns

StepLanguageWordMeaning
1Swedishhönschicken, fowl (bird of the genus Gallus, especially Gallus gallus domesticus)
Every word from Proto-Indo-European ḱerh₂-Every word from Proto-Indo-European ḱerh₂s-Every word from Proto-Germanic hersô