A Quenya term appearing in Númenórean stories from the 1940s referring to the entirety of existence, both the physical universe and Heaven (SD/401), apparently a combination of ilúve “universe” or “Heaven” and ilu “universe, world”.
Qenya
ilu
noun. universe, world
ilumíre
proper name. Silmaril
ilurambar
proper name. Walls of the World
ilu ilúvatar en káre eldain a fírimoin
the Father made the World for Elves and Mortals
ilu vanya, fanya, eari, i-mar, ar ilqa ímen
the World is fair, the sky, the seas, the earth, and all that is in them
ilúve ilu
proper name. Heaven, the universe, all that is
ilduma
noun. heaven
ilúvatar
masculine name. All-father
ilúve
noun. universe, world; Heaven
noldomír(e)
proper name. Silmaril
qáqi
adverb. all
silmaril
proper name. Silmaril
Another name for a Silmaril appearing in The Etymologies from the 1930s (Ety/IL), apparently a compound of ilu “world” and míre “jewel”.