Where does “hauraus-raihnausoireyhtymä” come from?

hauraus-raihnausoireyhtymä (Finnish) comes from Finnish oireyhtymä, from Finnish yhtymä, from Finnish yhtyä, from Finnish yksi, from Proto-Finnic ükci, from Proto-Uralic ükte — one.

Ancestry of “hauraus-raihnausoireyhtymä”, step by step

hauraus-raihnausoireyhtymä traces back through 3 separate lines of ancestry.

via Finnish oireyhtymä

Step	Language	Word	Meaning
1	Finnish	oireyhtymä	syndrome
2	Finnish	yhtymä	combine
3	Finnish	yhtyä	To unite; To concur
4	Finnish	yksi	one
5	Proto-Finnic	ükci	one
6	Proto-Uralic	ükte	one

via Finnish hauraus

Step	Language	Word	Meaning
1	Finnish	hauraus	fragility, brittleness, frailty
2	Finnish	hauras	brittle, fragile, frail, friable, crumbly,...
3	Proto-Finnic	hapras	brittle, fragile, weak

via Finnish raihnaus

Step	Language	Word	Meaning
1	Finnish	raihnaus	dilapidation
2	Finnish	-us	Forms nouns from verbs, describing an action or...
3	Proto-Finnic	-us	Forms some nouns from nominal stems

Every word from Proto-Uralic ükte →Every word from Proto-Finnic ükci →Every word from Finnish yksi →