ikkunasyvennys (Finnish) comes from Finnish ikkuna, from Finnish akkuna, from Proto-Finnic *akkuna, from Old East Slavic окъно, from Proto-Slavic okъnò — window.
ikkunasyvennys (Finnish): window recess
Definitions
window recess
Ancestry of “ikkunasyvennys”, step by step
ikkunasyvennys traces back through two separate lines of ancestry.