Where does “ryski-” come from?

ryski- (Finnish) comes from Polish Ryga, from Italian riga, from Old High German riga, from Proto-Germanic rīgǭ, from Proto-Indo-European h₁reyk- — to scratch, cut.

Ancestry of “ryski-”, step by step

StepLanguageWordMeaning
1PolishRygagrid paper
2Italianrigaline; stripe; parting
3Old High Germanrigaline
4Proto-Germanicrīgǭrow, line
5Proto-Indo-Europeanh₁reyk-to scratch, cut
Every word from Proto-Indo-European h₁reyk- →Every word from Proto-Germanic rīgǭ →Every word from Old High German riga →