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
uiar
masculine name.
Ulmo
uil
noun.
seaweed
uidavnen
adjective.
ever-closed
ui-
prefix.
twi-
uial
noun.
twilight
uilos
place name.
Everlasting Snow
uilw
noun.
embers
uir
noun.
eternity
uial
noun.
twilight
uil
noun.
seaweed
uir
noun.
eternity
uireb
adjective.
eternal
uireb
adjective.
eternal
oeruil
noun.
seaweed
guilos
place name.
ever-snow
guir
noun.
eternity
guireb
adjective.
eternal
oeruil
noun.
seaweed
lhorn
noun.
quiet water
eil-
verb.
to rain
iûl
noun.
embers
o
preposition.
from, of (preposition (as a proclitic) used in either direction, from or to the point of view of the speaker)
davnan
adjective.
?closed
forn(en)
adjective.
closed
i
article.
the
nen
noun.
water
a(n)
preposition.
of
al-
prefix.
no, not
anaur
noun.
Sun
anor
noun.
Sun
balan
noun.
Vala, divine power, divinity
bellas
noun.
bodily strength
bess
noun.
(young) woman
bess
noun.
wife
brassen
adjective.
white-hot
dess
noun.
young woman
dî
noun.
woman, lady
fein
noun/adjective.
white
fein
noun/adjective.
cloud
heron
noun.
master
hîr
noun.
master, lord
i
definite article.
the
i
definite article.
who
iell
noun.
daughter
iell
noun.
girl, maid
iell
noun.
daughter
iûl
noun.
embers
lhorn
noun.
anchorage, harbour
mel-
verb.
to love
meleth
noun.
love
meleth
noun.
love
mîl
noun.
love, affection
mû
interjection.
no
nan
preposition.
of
nen
noun.
water (used of a lake, pool or lesser river)
nen
noun.
waterland
núron
masculine name.
Ulmo
nûr
adjective.
deep
nûr
adjective.
deep
o
preposition.
from, of
orthor-
verb.
to master, conquer
penedh
noun.
Elf
penn
noun.
Elf
sell
noun.
daughter
sell
noun.
girl, maid (child)
tad
cardinal.
two
tâd
cardinal.
two
tâd
cardinal.
two
tû
noun.
muscle, sinew, vigour, physical strength
tûr
noun.
mastery, victory
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.