The root ᴹ√EREK appeared in The Etymologies of the 1930s with the gloss “thorn” and derivatives meaning “prick” or “holly” in both Quenya and Noldorin (Ety/ERÉK). Elsewhere in the document it appeared in its unaugmented form ᴹ√REK (EtyAC/REK). It was the basis of the two names Ilk. Region and N. Eregion “Hollin”. The continued appearance of these names in the legendarium indicates the continued validity of these roots.
Middle Primitive Elvish
eremaloitē
adjective. eremaloitē
er
root. one, only, be alone, deprived
erekwa
adjective. isolated
eredē
noun. seed
ered
root. *seed
rē/ere
root. bear, produce
khal
root. uplift, erect, lift from ground, (make) stand up
(e)rek
root. thorn, holly
stā
root. [unglossed]
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).
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.
edenā
adjective. first
settā
adjective. first
anga
root. iron
auluta-
verb. [unglossed]
kaltwa
?. [unglossed]
kōmā
noun. [unglossed]
red
root. scatter, sow
torōmā
noun. [unglossed]
bay
root. [unglossed]
iw
root. [unglossed], [ᴱ√] *fish
khlip
root. [unglossed]
An unglossed root in a rejected paragraph from the Quenya Verbal System (QVS) written in 1948 (PE22/112 note #78).
phan
root. [unglossed]
A deleted root in The Etymologies of the 1930s with no glosses or derivatives and no clear function (EtyAC/PHAN).
stin
root. [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).
A root appearing as {GERE/GRÉ >>} ERE/RÉ “bear, produce” in drafts for the first version of Quenya Personal Pronouns (QPP1) from the late 1940s, contrasted with masculine ᴹ√NŌ/ONO “beget” (PE23/87 note #85). In these rejected notes, RÉ was the basis for various feminine adjectives and NŌ the basis for various masculine adjectives. Elsewhere √NŌ was not specifically masculine, so I think this was a transient idea.