Where does “vaalihuoneisto” come from?

vaalihuoneisto (Finnish) comes from Finnish vaali, from Swedish väl, from Old Swedish hval, from Old Norse hvalr, from Proto-Germanic hwalaz, from Proto-Indo-European (s)kʷálos — large fish; sheatfish.

Ancestry of “vaalihuoneisto”, step by step

vaalihuoneisto traces back through two separate lines of ancestry.

via Finnish vaali

Step	Language	Word	Meaning
1	Finnish	vaali	election; Third-person singular indicative past...
2	Swedish	väl	well; accurately, completely, to a significant...
3	Old Swedish	hval	whale
4	Old Norse	hvalr	whale
5	Proto-Germanic	hwalaz	whale, sheatfish
6	Proto-Indo-European	(s)kʷálos	large fish; sheatfish

via Finnish huoneisto

Step	Language	Word	Meaning
1	Finnish	huoneisto	apartment, flat
2	Finnish	huone	room; house; house, hall
3	Proto-Finnic	hooneh	building; room

Every word from Proto-Indo-European (s)kʷálos →Every word from Proto-Germanic hwalaz →Every word from Old Norse hvalr →