The Silmarillion

ur- 'heat, be hot' in Urulóki; cf. Urimë and Urui, Quenya and Sindarin names of the eighth month of the year (The Lord of the Rings Appendix D). Related is the Quenya word aure 'sunlight, day' (cf. Fingon's cry 'before the Nirnaeth Arnoediad), Sindarin aur, which in the form Or- is prefixed to the names of the days of the week.

val- 'power' in Valar, Valacirca, Valaquenta, Valaraukar, Val(i)mar, Valinor. The original stem was bal-, preserved in Sindarin Balan, plural Belain, the Valar, and in Balrog.

wen 'maiden' is a frequent ending, as in Eärwen, Morwen.

wing 'foam, spray' in Elwing, Vingilot (and only in these two names).

yave 'fruit' (Quenya) in Yavanna; cf. Yavannie, Quenya name of the ninth month of the year, and yavie 'autumn' (The Lord of the Rings Appendix D).