Where does “virtaviivaistaminen” come from?

virtaviivaistaminen (Finnish) comes from Finnish virtaviivaistaa, from Finnish virtaviivainen, from Finnish virtaviiva, from Finnish virta, from Proto-Finnic virta, from Proto-Slavic vьrtъ — turn, enclosure.

Ancestry of “virtaviivaistaminen”, step by step

StepLanguageWordMeaning
1FinnishvirtaviivaistaaTo streamline
2Finnishvirtaviivainenstreamlined
3Finnishvirtaviivastreamline
4Finnishvirtaflow, stream; river; current
5Proto-Finnicvirtastream; flow, current
6Proto-Slavicvьrtъturn, enclosure
Every word from Proto-Slavic vьrtъ