duinen
noun.
flood, high tide
aran
'high or noble person'
rodon
'One of the High'
terchil
noun.
'high-Men'
Ara-
prefix.
high, noble, royal
Menel
noun.
sky, high heaven, firmament, the region of the stars
aglonn
noun.
defile, pass between high walls
ar-
prefix.
high, noble, royal
cirith
noun.
cleft,
high climbing pass, narrow passage cut through earth or rock,
ravine, defile
duinen
noun.
flood, high tide
or
high
or
high
orchal
adjective.
tall, tall; [N.] superior, eminent, lofty
taer
adjective.
lofty
Andrath
high pass
aglonn
pass between high walls
aglonn
pass between high walls
duinen
high tide
taen
summit (of high mountain)
telu
high roof
andrath
high pass
duinen
high tide
telu
high roof
hallas
noun.
height
taen
height
taen
height
criss
noun.
cleft, cleft, [N.] cut, slash, [G.] gash; [N.] pass, [G.] gully, ravine
raud
tall
rodel
lady
gondrath
highway
aglonn
defile
ar
noble
arn
noble
arth
lofty
beleg
mighty
hall
exalted
or
above
taur
vast
telu
dome
aglonn
defile
ar
noble
brand
lofty
brand
noble
hall
exalted
or
above
raud
noble
taur
vast
taur
lofty
taur
tall
taur
mighty
telu
dome
arod
adjective.
noble
an-
very
aran
king
arphen
noble
arth
exalted
baradh
steep
caw
top
celeb
silver
ceven
earth
dae
very
dîn
gap
eria
rise
galadh
tree
heryn
lady
im
dell
main
chief
mîn
towering
nu
under
or
above
rist
cleft
rodon
vala
rîs
queen
thanc
cleft
toll
island
tond
tall
tûm
deep valley
tûm
deep valley
(h)law
noun.
flood
Amroth
noun.
Amroth
Ara-
prefix.
king
Menel
noun.
the heavens
ar-
prefix.
king
ara
noun.
king
aran
noun.
king (used of a lord or king of a specified region)
arod
adjective.
tall
arod
adjective.
noble
arod
noble
arod
adjective.
noble
arod
adjective.
noble
arphen
noun.
a noble
arth
adjective.
(unknown meaning, perhaps (?) noble, lofty, exalted)
balan
Vala
belaith
adjective.
mighty
belaith
adjective.
mighty
bereth
noun.
queen, spouse
brann
towering
cae
noun.
earth
celeb
noun.
silver
celeb
silver
celeb
noun.
silver
ceven
noun.
Earth
ennorath
noun.
central lands, middle-earth
falch
noun.
deep cleft, ravine
galadh
noun.
tree
galadh
tree
galadh
tree
galadh
noun.
tree
heruin
noun.
lady
heruin
noun.
lady
heryn
noun.
lady
heryn
noun.
lady
heryn
noun.
lady
hiril
noun.
lady, lady; [G.] princess, †queen
hlô
noun.
flood
im
noun.
dell, deep vale
ithildin
noun.
a silver-colored substance, which mirrors only starlight and moonlight
lebethron
noun.
a tree - its black wood was used by the woodwrights of Gondor
lô
flood
maer
adjective.
excellent
malhorn
noun.
golden tree of Lothlórien
mallorn
noun.
golden tree of Lothlórien
malthorn
noun.
golden tree of Lothlórien
mithril
noun.
true-silver, a silver-like metal
nu
preposition.
under
nu
preposition.
under
nuin
preposition.
under the
orn
noun.
(any large) tree
orod
mount
oron
noun.
tree
raud
lofty
raud
excellent
riss
adjective.
cleft
rían
noun.
queen, queen, *(lit.) crowned-lady
rîs
noun.
queen
taer
lofty
thanc
adjective.
cleft, split, forked
tol
noun.
island, (steep) isle rising with sheer sides from the sea or from a river
amar
earth
an-
very
aran
king
arn
noble
arphen
noble
arth
lofty
arth
exalted
arwen
noble woman
baradh
steep
bassoneth
lady
beleg
mighty
bereth
queen
brand
tall
brennil
lady
bâr
earth
cae
noun.
earth
cae
earth
caw
top
ceven
earth
cirith
cleft
criss
cleft
cîl
cleft
dae
adverb.
very
dae
very
dî
lady
dî
under
dîn
gap
ennor
place name.
central land, middle-earth
eria
rise
falch
cleft
galadh
tree
galadhon
of or related to trees
galadhrim
people of the trees
gass
gap
hall
tall
heryn
lady
hiril
lady
huorn
walking tree of fangorn
im
dell
lebethron
oak tree
main
chief
mîn
towering
nothlir
family tree
nu
under
orchall
lofty
orn
tall
orn
tree
raud
tall
rest
cleft
rist
cleft
rían
queen
ríen
queen
rîs
noun.
queen
rîs
queen
taur
king
thanc
cleft
toll
island
tond
adjective.
tall
tond
tall
toss
low-growing tree
This root and ones like it were used for “high” things for much of Tolkien’s life. It first appeared as unglossed ᴱ√TAHA in the Qenya Lexicon of the 1910s with derivatives like ᴱQ. tā “high; high above, high up”, ᴱQ. tahōra or tayóra “lofty”, and ᴱQ. tāri “queen”; it had a variant form ᴱ√TAʕA where the ʕ might be a malformed Y (QL/87). The corresponding forms in the contemporaneous Gnomish Lexicon were G. dâ “high” and G. dara “lofty” (GL/29), indicating the true form of the root was ᴱ√DAHA, since initial voiced stops were unvoiced (d- > t-) in Early Qenya (PE12/17). Primitive forms like ᴱ✶dagá > ᴱN. dâ/ᴱQ. tá “high” in Early Noldorin Word-lists of the 1920s indicates the root continued to begin with D for the following decade (PE13/141, 161).
In The Etymologies of the 1930s Tolkien gave this root as ᴹ√TĀ/TAƷ “high, lofty; noble” with derivatives like ᴹQ. tára “lofty, high”, ᴹQ. tári “queen” and N. taen “height, summit of high mountain” (Ety/TĀ). In Definitive Linguistic Notes (DLN) from 1959 Tolkien gave the root as √TAG or Tā- “high”, and in notes from around 1967 Tolkien gave √TAƷ as the explanation of the initial element of Q. Taniquetil and contrasted it with √TĂR “stand” (PE17/186). In 1970 green-ink revisions to the Outline of Phonology (OP2), Tolkien wrote a marginal note giving √TAƷ > TĀ “high”, but this note was rejected with a statement “transfer to Gen. Structure. No [ʒ] existed in Eldarin” (PE19/72-73 note #22).
This last rejection seems to be part of Tolkien’s general vacillation on the nature and phonetic evolution of velar spirants in Primitive Elvish in 1968-70. For purposes of Neo-Eldarin, I would assume the root form was √TAH or √TAƷ > √TĀ as the basis for “high” words, much like √MAH or √MAƷ > ✶mā was the basis for “hand” words.