írë (1) noun "desire". (ID). In the pre-classical Tengwar system presupposed in the Etymologies, írë was also the name of a long carrier with an i-tehta above it, denoting long í. (VT45:17).
Quenya
írë
eternal
írë
desire
írë
when
írë (2) conj. "when" (subordinate conjunction, not question-word: írë Anarinya queluva, "when my sun faileth") (FS). Compare yá #2.
íre
noun. longing
írë
noun. desire, desire, [ᴹQ.] longing
[írë] (3) noun "eternal" (read "eternity", as suggested by Christopher Tolkien, but the word was in any case changed to oirë)(GEY, VT45:13)