A root in The Etymologies of the 1930s glossed “day” with various derivatives like ᴹQ. are, N. aur “day” and ᴹQ. arin “morning” (Ety/AR¹). In Tolkien’s later writings, the Quenya word for “day” became aurë (RC/727; S/190), and in 1957 Quenya Notes he devised a new etymology for these day-words from the root √UR “heat” as in ✶auri “heat, period of sun” (PE17/148). That opens the question whether the various 1930s Quenya “morning” words from ᴹ√AR remain valid, but many Neo-Quenya writers (including me) retain them since there aren’t really any good alternatives. They might be salvageable as derivatives of the later root √AS “warmth” (so that “day” = “hot” and “morning” = “warm”).
Middle Primitive Elvish
war
root. give way, yield, not endure, let down, betray
ar
root. day
gwar-
prefix. other, different
oktā
noun. strife, war
lauka
adjective. warm
law
root. warm; abound
ndākō
noun. warrior, soldier
thur
root. surround, fence, ward, hedge in, secrete
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.
berō
noun. valiant man, warrior
mbakhā
noun. article (for exchange), ware, thing
wegō
suffix. man; warrior
dēr
noun. man
anār
noun. Sun
ari
noun. day
aya
root. other, different (of larger numbers)
kalrondō
noun. hero
lin
root. sing
makla
noun. sword
turumbē
noun. shield
turumā
noun. shield
A (Noldorin only?) root in The Etymologies of the 1930s glossed “give way, yield, not endure, let down, betray” with derivatives like N. awarth “abandonment”, N. gwarth “betrayer”, and N. gweria- “betray” (Ety/WAR). Tolkien said it was the opposite of ᴹ√BOR “endure” (EtyAC/WAR) which had various Noldorin derivatives having to do with loyalty (Ety/BOR).