urine – моча
urine (n.) (из старофранцузского «orine, urine»); из латинского «urina» - моча; из PIE *ur-, разновидность корня *we-r- - вода, жидкость, молоко
c. 1300, from Old French orine, urine (12c.) and directly from Latin urina "urine," from PIE *ur- (source also of Greek ouron "urine"), variant of root *we-r- "water, liquid, milk" (source also of Sanskrit var "water," Avestan var "rain," Lithuanian jures "sea," Old English wær, Old Norse ver "sea," Old Norse ur "drizzling rain"), related to *eue-dh-r

“Wiktionary”:
From Proto-Indo-European *ur, *uh₁r-; compare Ancient Greek οὖρον ‎(oûron), ούρα ‎(oúra, “urine”); variant of root *awer- ‎(“to moisten, flow” – мочить, течь), cf. *weh₁r- ‎(“water, liquid, milk” – вода, жидкость, молоко). See also Sanskrit वार् ‎(vār, “water”), Avestan ‎(var, “rain”), Lithuanian jūra ‎(“sea”), Old English wær, Old Norse ver ‎(“sea”), ur ‎(“drizzling rain”).

1) Возможно, лью – Л – Λ – Р
2) У ФиН – роняю.