Where does “beanbrain” come from?

beanbrain (English) comes from English bean, from Middle English bene, from Old English bēn, from Proto-Germanic banjō, from Proto-Indo-European gʷʰon-yeh₂, from Proto-Indo-European gʷʰen-, from Proto-Indo-European bʰon-.

beanbrain (English): A stupid person; an idiot

Definitions

  1. A stupid person; an idiot

Ancestry of “beanbrain”, step by step

beanbrain traces back through two separate lines of ancestry.

via English bean

StepLanguageWordMeaning
1EnglishbeanAny plant of several genera of the taxonomic...
2Middle Englishbenegracious, generous, pleasant; neighbourly help,...
3Old Englishbēnprayer, request; prayer, request, petition,...
4Proto-Germanicbanjōwound
5Proto-Indo-Europeangʷʰon-yeh₂
6Proto-Indo-Europeangʷʰen-to strike, slay, kill
7Proto-Indo-Europeanbʰon-

via English brain

StepLanguageWordMeaning
1EnglishbrainThe control center of the central nervous system...
2Middle EnglishbraynThe brain or cerebrum; the organ of thought;...
3Old Englishbræġnbrain
4Proto-West Germanic*bragnbrain
5Proto-Germanicbragnąbrain
6Proto-Indo-Europeanmregʰnomskull, brain
7Proto-Indo-Europeanmen-to think, mind; spiritual activity; to stay,...
Every word from Proto-Indo-European bʰon-Every word from Proto-Indo-European gʷʰen-Every word from Proto-Indo-European gʷʰon-yeh₂