Where does “epämääräisyysperiaate” come from?

epämääräisyysperiaate (Finnish) comes from Finnish periaate, from Finnish aate, from Finnish aatella, from Finnish ajatella, from Finnish ajattaa, from Finnish ajaa, from Proto-Finnic ajadak, from Proto-Uralic aja- — to drive.

Ancestry of “epämääräisyysperiaate”, step by step

epämääräisyysperiaate traces back through two separate lines of ancestry.

via Finnish periaate

StepLanguageWordMeaning
1Finnishperiaateprinciple
2Finnishaateideology
3FinnishaatellaAlternative form of ajatella
4Finnishajatellato think (about)
5FinnishajattaaTo have something driven
6Finnishajaato drive, ride, travel in a vehicle, transport in...
7Proto-Finnicajadakto go in a vehicle, to drive
8Proto-Uralicaja-to drive; to hunt, chase
9Proto-Indo-IranianHáȷ́atito drive, lead
10Proto-Indo-Europeanh₂éǵetito be driving
11Proto-Indo-Europeanh₂eǵ-to drive

via Finnish epämääräisyys

StepLanguageWordMeaning
1Finnishepämääräisyysindefiniteness
2Finnishepämääräinenvague, nonspecific, indefinite, uncertain;...
3Finnishmääräinendefinite; As headword in a compound term...
4Finnishmääräamount, quantity; count, number; aim, target,...
5Old East Slavicмѣра
6Proto-Slavicměrameasure
7Proto-Balto-Slavicmḗˀrāˀ
8Proto-Indo-Europeanmeh₁-reh₂
9Proto-Indo-Europeanmeh₁-to measure
Every word from Proto-Indo-European h₂eǵ-Every word from Proto-Indo-European h₂éǵetiEvery word from Proto-Indo-Iranian Háȷ́ati