Where does “mustasilmäpapu” come from?

mustasilmäpapu (Finnish) comes from Finnish papu, from Proto-Finnic papu, from Proto-Slavic bobъ, from Proto-Indo-European bʰabʰ- — bean.

Ancestry of “mustasilmäpapu”, step by step

mustasilmäpapu traces back through two separate lines of ancestry.

via Finnish papu

StepLanguageWordMeaning
1Finnishpapubean; common bean; muscle, especially the biceps
2Proto-Finnicpapubean
3Proto-Slavicbobъbean, fava bean
4Proto-Indo-Europeanbʰabʰ-bean

via Finnish mustasilmä

StepLanguageWordMeaning
1Finnishmustasilmä—
2Finnishsilmäeye; mesh, opening in a mesh or net
3Proto-Finnicsilmäeye
4Proto-Uralicśilmäeye
Every word from Proto-Indo-European bʰabʰ- →Every word from Proto-Slavic bobъ →Every word from Proto-Finnic papu →