Where does “ruostepääsky” come from?
ruostepääsky (Finnish) comes from Finnish ruoste, from Proto-Finnic roostek, from Proto-Germanic rustaz, from Proto-Indo-European rudʰso-, from Proto-Indo-European h₁rewdʰ- — red.
ruostepääsky (Finnish): red-rumped swallow
Ancestry of “ruostepääsky”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Finnish | ruoste | rust; rusty; inessive case is sometimes better... |
| 2 | Proto-Finnic | roostek | rust |
| 3 | Proto-Germanic | rustaz | rust |
| 4 | Proto-Indo-European | rudʰso- | red |
| 5 | Proto-Indo-European | h₁rewdʰ- | red |