Where does “vierautua” come from?

vierautua (Finnish) comes from Finnish vieras, from Proto-Finnic veeras, from Proto-Finnic veeri, from Proto-Finno-Permic wäre.

Ancestry of “vierautua”, step by step

StepLanguageWordMeaning
1Finnishvierasunfamiliar; foreign; guest, visitor
2Proto-Finnicveerasguest, visitor; stranger; strange, foreign,...
3Proto-Finnicveeriside, flank; edge
4Proto-Finno-Permicwäre—
Every word from Proto-Finno-Permic wäre →Every word from Proto-Finnic veeri →Every word from Proto-Finnic veeras →