Where does “kupuikkuna” come from?

kupuikkuna (Finnish) comes from Finnish ikkuna, from Finnish akkuna, from Proto-Finnic *akkuna, from Old East Slavic окъно, from Proto-Slavic okъnò — window.

kupuikkuna (Finnish): dome window

Definitions

  1. dome window

Ancestry of “kupuikkuna”, step by step

kupuikkuna traces back through two separate lines of ancestry.

via Finnish ikkuna

StepLanguageWordMeaning
1Finnishikkunawindow; sash
2FinnishakkunaAlternative form of ikkuna
3Proto-Finnic*akkunawindow
4Old East Slavicокъноwindow
5Proto-Slavicokъnòwindow

via Finnish kupu

StepLanguageWordMeaning
1Finnishkupudome; canopy; crop, craw
2Proto-Finnickupucrop, craw
Every word from Proto-Slavic okъnò →Every word from Old East Slavic окъно →Every word from Proto-Finnic *akkuna →