-ui
suffix. adjective suffix
ui
noun. envelope (especially of the Outer Sea or Air enfolding the world within the Ilurambar or world-walls)
ui
adverb. ever
ui
noun. envelope
-eb
suffix. adjective suffix
-en
suffix. adjective suffix
-iel
suffix. adjective suffix
-in
suffix. adjective suffix
-ren
suffix. adjective suffix
-rin
suffix. adjective suffix
al-
prefix. no, not
mû
interjection. no
tad
cardinal. two
tâd
cardinal. two
tâd
cardinal. two
ui-
prefix. twi-
uinen
feminine name. Uinen
Noldorin name of ᴹQ. Uinen from The Etymologies from the 1930s (Ety/NEN, UY) derived from the same primitive form ✱✶Uinendă, as indicated by ON. Uinenda and the Quenya stem-form Uindend-.
Conceptual Development: In the Gnomish Lexicon from the 1910s, her Gnomish name was G. Uinen (GL/74), while her usual Qenya name from this period was ᴱQ. Ónen (LT1/61).
A noun appearing as N. ui “envelope” in The Etymologies of the 1930s derived from ON. uia < wōia [wǭia] < ᴹ✶wāyā under the root ᴹ√WAY of similar meaning (Ety/WAY). It was used “especially of the Outer Sea or Air enfolding the world within the Ilurambar or world-walls”. In Noldorin of the 1930s, it seems the normal development of ancient *āy* was *ui*, with the initial *w* vanishing before *u*: wāyā > wǭia > uia > ui.
Neo-Sindarin: In Sindarin of the 1950s and 60s it seems ancient *āy* became *oe*, as with goe < ✶gāyā (PM/363). As such the initial w- from ✶wāya would survive to become *gw-*. Indeed, Tolkien had ancient ✱wāya become gwoe in notes from around 1957 attempting to derive an etymology for gwae “wind” (PE17/34). As such, I would adapt this Noldorin word as ᴺS. gwoe “envelope” for purposes of Neo-Sindarin. I would use it in the more general sense of “a thing enveloping something else”, and not just limited to envelopes used for letters.