Where does “kuolemankaipuu” come from?

kuolemankaipuu (Finnish) comes from Finnish kaipuu, from Finnish uu, from Latin U, from Latin V, from Etruscan ? — u.

kuolemankaipuu (Finnish): death wish

Definitions

kuolemankaipuu traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Finnish	kaipuu	longing, yearning
2	Finnish	uu	The name of the Latin-script letter U; hole, nest
3	Latin	U	—
4	Latin	V	ve
5	Etruscan	?	u

Step	Language	Word	Meaning
1	Finnish	kuolema	death, demise, decease; deathly
2	Proto-Finnic	koolema	death
3	Proto-Finnic	kooldak	to die
4	Proto-Uralic	kale-	to die