A root in The Etymologies of the 1930s with the glosses “beat, hew” (Ety/DARÁM). It is probably a later iteration on the early root ᴱ√TARA(MA) “batter, thud, beat” from the Qenya Lexicon of the 1910s (QL/89). Its Gnomish forms DAR/D(A)RAM/DAM make clear the actual early root was ᴱ√DARA(MA), since initial d- > t- in Early Qenya. The last Gnomish form hints that the root in the 1930s might also have been related to ᴹ√(N)DAM “hammer, beat”.
Middle Primitive Elvish
thū
root. puff, blow
thur
root. surround, fence, ward, hedge in, secrete
thus
root. *smell, stench
daram
root. beat, hew, beat, hew; [ᴱ√] batter, thud
ndulna
adjective. secret
nur
root. deep
A root mentioned in The Etymologies as an extension of ᴹ√NU with the gloss “deep” and derivatives ᴹQ. núra and N. nûr of the same meaning (Ety/NU). Possibly related is the later word Q. nurtalë “hiding” as in Q. Nurtalë Valinóreva “Hiding of Valinor” (S/102).
nūrā
adjective. deep
tubnā
adjective. deep
ata
root. father
atar
noun. father
atū
noun. father
auluta-
verb. [unglossed]
bay
root. [unglossed]
iw
root. [unglossed], [ᴱ√] *fish
kaltwa
?. [unglossed]
khar
root. helmet
kharan
root. helmet
kharap
root. helmet
khlip
root. [unglossed]
An unglossed root in a rejected paragraph from the Quenya Verbal System of the 1940s (PE22/112 note #78).
kōmā
noun. [unglossed]
lepet
root. finger
maiga
root. [unglossed]
An unglossed root appearing in the first version of Tengwesta Qenderinwa from the 1930s (TQ1) to illustrate certain patterns of root formation (PE18/66). It may have serving as the basis for ᴹQ. Maia, though this word was given different derivations later.
pal
root. beat
phan
root. [unglossed]
A deleted root in The Etymologies of the 1930s with no glosses or derivatives and no clear function (EtyAC/PHAN).
skil
root. [unglossed]
A root mentioned in passing in as a variant of ᴹ√KIL “divide” in The Etymologies of the 1930s, but it had no derivatives and appeared nowhere else (Ety/KIL).
stin
root. [unglossed]
stā
root. [unglossed]
torōmā
noun. [unglossed]
uruk
root. [unglossed]
A root in The Etymologies of the 1930s with no glosses or derivatives and no clear function (EtyAC/URUK).
us
root. [unglossed]
A root in The Etymologies of the 1930s with no glosses or derivatives and no clear function (EtyAC/US).
yel
root. daughter
yen
root. daughter
yend
noun. daughter
A root in The Etymologies of the 1930s glossed “surround, fence, ward, hedge in, secrete”, with derivatives like N. thora- “fence” and Ilk. thúren “guarded, hidden”, the latter serving as an element in the names Ilk. Thuringwethil “(Woman of) Secret Shadow” and Ilk. Garthurian “Hidden Realm” (Ety/THUR). Both these names survived in later versions of The Silmarillion (S/178; WJ/189), and later names like S. Thurin “Secret” and S. Thuringud “Hidden Foe” (UT/157; WJ/256) imply the ongoing validity of this root, though the survival of u in S. thurin is rather mysterious; David Salo suggested the ancient form might originally have been thūrin(e) (GS/291).
The earliest precursor to Garthurian was G. Gar Furion “Secret Place” from the 1910s (PE13/102; PE15/24), which was based on the unglossed root ᴱ√FURU or ᴱ√HURU from the Qenya Lexicon of the 1910s with derivatives like ᴱQ. furin/G. furion “secret, hidden, concealed” and Q. furu/G. fûr “a lie” (QL/39; GL/36). In the Lost Tales of this period, Tolkien changed {G. Gar Furion >>} G. Gar Thurion (LT2/202), so it seems the shift from ᴱ√FURU >> ✱√ÞURU was very early.