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
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
anār
noun. Sun
ari
noun. day
dēr
noun. man
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).