Where does “surffauslauta” come from?

surffauslauta (Finnish) comes from Finnish surffaus, from Finnish surffata, from Finnish -ätä, from Finnish -tä, from Proto-Finnic -ta, from Proto-Uralic -tä — from.

Ancestry of “surffauslauta”, step by step

surffauslauta traces back through two separate lines of ancestry.

via Finnish surffaus

Step	Language	Word	Meaning
1	Finnish	surffaus	surfing
2	Finnish	surffata	To surf
3	Finnish	-ätä	Front vowel variant of -ata
4	Finnish	-tä	Front vowel variant of -ta
5	Proto-Finnic	-ta	Partitive ending
6	Proto-Uralic	-tä	from

via Finnish lauta

Step	Language	Word	Meaning
1	Finnish	lauta	A board; An element in many compound words, where...
2	Proto-Finnic	lauta	board, plank; table
3	Proto-Baltic	*plauˀtá	—
4	Proto-Indo-European	plew-	to fly, flow, run

Every word from Proto-Uralic -tä →Every word from Finnish -ätä →Every word from Finnish -tä →