Where does “ilmestyspäivä” come from?

ilmestyspäivä (Finnish) comes from Finnish ilmestys, from Finnish ilmestyä, from Finnish ilmetä, from Finnish ilmi, from Finnish Ilma, from Finnish -ri, from Finnish -ra, from Finnish -i — oblique plural.

Ancestry of “ilmestyspäivä”, step by step

ilmestyspäivä traces back through two separate lines of ancestry.

via Finnish ilmestys

StepLanguageWordMeaning
1FinnishilmestysVision, apparition, manifestation; Phenomenon,...
2Finnishilmestyäto appear, show up, materialize, pop up; to show...
3FinnishilmetäTo appear, turn out; to become apparent; to arise
4Finnishilmipublic, known, to the daylight, to the open;...
5FinnishIlmaair
6Finnish-riUsed to create names of occupations from nouns or...
7Finnish-raForms nouns or adjectives, mostly from nominal...
8Finnish-iA nominal suffix used in eg. ukko → ukki; Used...
9Proto-Uralic-joblique plural

via Finnish päivä

StepLanguageWordMeaning
1Finnishpäiväday; the sun
2Proto-Finnicpäiväsun; day
3Proto-Uralicpäjwä? warmth; ? sun; ? fire
4Proto-Uralicpäje
Every word from Proto-Uralic -jEvery word from Finnish -iEvery word from Finnish -ri