Where does “senaikuinen” come from?

senaikuinen (Finnish) comes from Finnish aikuinen, from Finnish aika, from Finnish -isin, from Hungarian isi, from Hungarian -i, from Hungarian -é, from Albanian -ë, from Proto-West Germanic -jā — Creates collective nouns, which refer to groups...

Ancestry of “senaikuinen”, step by step

senaikuinen traces back through two separate lines of ancestry.

via Finnish aikuinen

StepLanguageWordMeaning
1Finnishaikuinenadult
2Finnishaikatime; time, moment; appointment
3Finnish-isinThe case suffix denoting temporal distributive;...
4Hungarianisischool
5Hungarian-iAdded to a proper noun, noun or postposition to...
6HungarianUsed to form the lative, expressing the direction...
7Albanian-ing, -ion
8Proto-West Germanic-jā
9Proto-Indo-European-íh₂
10Proto-Indo-European-h₂Creates collective nouns, which refer to groups...

via Finnish se

StepLanguageWordMeaning
1Finnishseit; that; he, she
2Proto-Finnicseit
3Proto-Uralicśeit
Every word from Proto-Indo-European -h₂Every word from Hungarian -iEvery word from Hungarian