ui
noun. envelope
ui
adverb. ever
ui
noun. envelope (especially of the Outer Sea or Air enfolding the world within the Ilurambar or world-walls)
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).
ui-
prefix. twi-
-ui
suffix. adjective suffix
-eb
suffix. adjective suffix
-en
suffix. adjective suffix
amon
noun. hill
-iel
suffix. adjective suffix
-in
suffix. adjective suffix
-ren
suffix. adjective suffix
-rin
suffix. adjective suffix
adwen
noun. [unglossed]
al-
prefix. no, not
amon
noun. hill, steep-sided mount
bellas
noun. bodily strength
borth
?. [unglossed]
clei
?. [unglossed]
coen
?. [unglossed]
dath
noun. hole, pit, steep fall, abyss
diragas
?. [unglossed]
gas
noun. hole, gap
mauth
?. [unglossed]
menwed
?. [unglossed]
mindon
noun. isolated hill, especially a hill with a watch tower
mindon
noun. tower
mû
interjection. no
nith
?. [unglossed]
nithrad
?. [unglossed]
níth
?. [unglossed]
porennin
?. [unglossed]
tad
cardinal. two
telwen
?. [unglossed]
ters
noun. (fine pierced) hole
tess
noun. (fine pierced) hole
torech
noun. hole, excavation, lair
tund
noun. hill, mound
tunn
noun. hill, mound
tâd
cardinal. two
tâd
cardinal. two
tû
noun. muscle, sinew, vigour, physical strength
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.