Where does “borstspeld” come from?

borstspeld (Dutch) comes from Dutch speld, from Middle Dutch spelde, from Dutch spelle, from Latin spīnula, from Latin -ulus, from Proto-Italic -olos, from Proto-Italic -elos, from Proto-Indo-European -e-lós — Forms agent nouns from verbal roots.

Ancestry of “borstspeld”, step by step

borstspeld traces back through two separate lines of ancestry.

via Dutch speld

StepLanguageWordMeaning
1DutchspeldA pin; A brooch
2Middle Dutchspelde
3Dutchspelle
4Latinspīnula
5Latin-ulusUsed to form a diminutive of a noun, indicating...
6Proto-Italic-olos
7Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
8Proto-Indo-European-e-lós
9Proto-Indo-European-lósForms agent nouns from verbal roots

via Dutch borst

StepLanguageWordMeaning
1Dutchborstchest, thorax; breast
2Middle Dutchborstchest; breast
3Old Dutchbrustchest
4Proto-West Germanicbrustbreast, chest
5Proto-Germanicbrustsbreast, chest
6Proto-Indo-Europeanbʰrews-to break
Every word from Proto-Indo-European -lós