Where does “vetovalikko” come from?

vetovalikko (Finnish) comes from Finnish veto, from Latin veto, from Latin voto, from Proto-Italic wetā(je)-, from Proto-Indo-European weth₂- — to say.

Ancestry of “vetovalikko”, step by step

vetovalikko traces back through two separate lines of ancestry.

via Finnish veto

Step	Language	Word	Meaning
1	Finnish	veto	pull; draught/draft of air; stroke of hand, oar...
2	Latin	veto	I forbid, oppose, veto; I forbid it! I protest!
3	Latin	voto	dative/ablative masculine/neuter singular of...
4	Proto-Italic	wetā(je)-	—
5	Proto-Indo-European	weth₂-	to say

via Finnish välikkö

Step	Language	Word	Meaning
1	Finnish	välikkö	passage
2	Finnish	-ikko	Forms nouns for groups of a particular number,...
3	Proto-Finnic	-ikko	Forms nouns indicating a group of things
4	Proto-Finnic	-i-	Plural number marker in other cases than the nominative (and optionally the genitive)

Every word from Proto-Indo-European weth₂- →Every word from Proto-Italic wetā(je)- →Every word from Latin voto →