Where does “uuvutustaistelu” come from?

uuvutustaistelu (Finnish) comes from Finnish uuvutus, from Finnish uuvuttaa, from Finnish uupua, from Finnish uu, from Latin U, from Latin V, from Etruscan ? — u.

uuvutustaistelu (Finnish): battle of attrition

Definitions

battle of attrition

Ancestry of “uuvutustaistelu”, step by step

uuvutustaistelu traces back through two separate lines of ancestry.

via Finnish uuvutus

Step	Language	Word	Meaning
1	Finnish	uuvutus	exhausting causing to get exhausted
2	Finnish	uuvuttaa	to exhaust
3	Finnish	uupua	to get tired, get exhausted, get fatigued; to be...
4	Finnish	uu	The name of the Latin-script letter U; hole, nest
5	Latin	U	—
6	Latin	V	ve
7	Etruscan	?	u

via Finnish taistelu

Step	Language	Word	Meaning
1	Finnish	taistelu	fight; struggle; battle
2	Finnish	-u	Forms nouns from verbs. Most common with "e"- and...
3	Proto-Finnic	-u	Forms nouns from adjectives, nouns

Every word from Etruscan ? →Every word from Latin V →Every word from Latin U →