Where does “beef-brained” come from?

beef-brained (English) comes from English beef, from Middle English bef, from Old French buef, from Latin bōs, from Ancient Greek βοῦς, from Latin corvus, from Proto-Italic korwos, from Proto-Indo-European ḱorh₂wós — army.

Ancestry of “beef-brained”, step by step

beef-brained traces back through two separate lines of ancestry.

via English beef

StepLanguageWordMeaning
1EnglishbeefThe meat from a cow, bull, or other bovine; A...
2Middle Englishbefbeef; cow flesh or meat; A bovine or its carcass
3Old Frenchbuefcow
4Latinbōshead of cattle (cow, bull, steer, or ox)
5Ancient Greekβοῦςcow, ox, cattle; shield: ὃτι ἐκ βοείων ἐστι...
6LatincorvusA raven; a bird associated with prophecy and...
7Proto-Italickorwos
8Proto-Indo-Europeanḱorh₂wós
9Proto-Indo-Europeanḱer-to grow, to make grow, to nourish; to plait,...
10Proto-Indo-Europeankr̥-to turn, to bend
11Proto-Indo-Europeanker-army

via English brained

StepLanguageWordMeaning
1EnglishbrainedHaving a particular kind or number of brain;...
2EnglishbrainThe control center of the central nervous system...
3Middle EnglishbraynThe brain or cerebrum; the organ of thought;...
4Old Englishbræġnbrain
5Proto-West Germanic*bragnbrain
6Proto-Germanicbragnąbrain
7Proto-Indo-Europeanmregʰnomskull, brain
8Proto-Indo-Europeanmen-to think, mind; spiritual activity; to stay,...
Every word from Proto-Indo-European ker-