Where does “pyrstösulka” come from?
pyrstösulka (Finnish) comes from Finnish pyrstö, from Proto-Germanic burstiz, from Proto-Germanic bʰurstís, from Proto-Indo-European bʰr̥s-tí-s, from Proto-Indo-European bʰers- — top, tip, point.
pyrstösulka (Finnish): tail feather
Ancestry of “pyrstösulka”, step by step