Where does “nelilapekatto” come from?

nelilapekatto (Finnish) comes from Finnish katto, from Finnish kattaa, from Proto-Finnic kattadak, from Proto-Finnic kanci, from Czech -í, from Old Czech -í, from Proto-Slavic -jь, from Proto-Indo-European yós — fluidity, slime, poison; poison; poison; slime;...

Ancestry of “nelilapekatto”, step by step

nelilapekatto traces back through two separate lines of ancestry.

via Finnish katto

StepLanguageWordMeaning
1Finnishkattoceiling; roof
2Finnishkattaato roof; to cover; to set, lay
3Proto-Finnickattadakto cover; to roof
4Proto-Finnickancicover, lid
5CzechForming attributive adjectives from nouns,...
6Old Czechforming attributive adjectives from nouns, especially animals
7Proto-Slavic-jьAdjectival inherited from the Caland roots,...
8Proto-Indo-Europeanyósthat, who, which
9Proto-Finnicwiša
10Proto-Indo-Iranianwišáspoison, venom
11Proto-Indo-Europeanwisósfluidity, slime, poison; poison; poison; slime;...

via Finnish lape

StepLanguageWordMeaning
1Finnishlapethe flat of a blade; any of the flat or sloped...
2Finnish-eUsed for forming nouns from verbs or adjectives
3Finnishhartiashoulder
4Serbo-Croatianhartijapaper
5Greekχαρτίpaper
6Koine Greekχαρτίονpaper, papyrus
7Ancient Greekχάρτηςsheet of paper, paper; book
8Ancient Greekχαράσσωto sharpen; to engrave, carve, write, draw, stamp
9Proto-Indo-Europeanǵʰer-to yearn for; to enclose; bowels, intestines
Every word from Proto-Indo-European wisósEvery word from Czech Every word from Proto-Indo-Iranian wišás