Where does “neljässijainen” come from?

neljässijainen (Finnish) comes from Finnish sija, from Proto-Finnic sija, from Proto-Germanic stiją, from Proto-Indo-European steyh₂-, from Proto-Indo-European steh₂- — to stand.

neljässijainen (Finnish): quaternary of fourth rank or order

Definitions

quaternary of fourth rank or order

Ancestry of “neljässijainen”, step by step

neljässijainen traces back through two separate lines of ancestry.

via Finnish sija

Step	Language	Word	Meaning
1	Finnish	sija	place, position, room, stead, instead; ranking;...
2	Proto-Finnic	sija	place, position
3	Proto-Germanic	stiją	—
4	Proto-Indo-European	steyh₂-	to stiffen
5	Proto-Indo-European	steh₂-	to stand

via Finnish neljäs

Step	Language	Word	Meaning
1	Finnish	neljäs	fourth
2	Proto-Finnic	neljänci	fourth
3	Proto-Finnic	neljä	four
4	Proto-Uralic	neljä	four

Every word from Proto-Indo-European steh₂- →Every word from Proto-Indo-European steyh₂- →Every word from Proto-Germanic stiją →