A noun in The Etymologies of the 1930s glossed “shadow” derived from the root ᴹ√DAY of the same meaning (Ety/DAY). The original penciled version had {daer >>} dae, while the inked version had daew “shadow (cast by an object or form)” and Dae “shade” (EtyAC/DAY). It was most notably an element in the name N. Dor-Daedeloth “Land of the Shadow of Dread” (LR/120, 405). Christopher Tolkien had S. dae “shadow” in The Silmarillion appendix (SA/dae), but I suspect that was copied from The Etymologies. In later writings, Tolkien seems to have changed the initial element of Daedeloth to a variant of S. daer “great”, and its meaning from “Shadow of Dread” to “Great Dread” (WJ/183).
Noldorin
lhum
noun. shade
gwath
noun. shade
lhum
noun. shade
dae
noun. shadow (cast by an object or form), shade
gwath
noun. shade, shadow, dim light
dae
noun. shadow
daew
noun. shadow
daw
noun. night-time, gloom
faun
noun. cloud
faun
noun. cloud
fuin
noun. night, dead of night, gloom, darkness
gwath
noun. stain
maur
noun. gloom
maur
noun. gloom
A noun in The Etymologies of the 1930s glossed “gloom” appearing under the root ᴹ√MOR (Ety/MOR). A nearby primitive form ᴹ✶mǭri is the likely basis for this word as suggested by Carl Hostetter and Patrick Wynne (EtyAC/MOR), where the primitive ǭ became au as was the usual sound change in both Noldorin and later Sindarin (PE18/46, 96).
ogol < ogl
gloom
n/adj gloom, gloomy
tindu
noun. dusk, twilight, early night (without Moon)
tindu
noun. starry twilight
tinnu
noun. dusk, twilight, early night (without Moon)
tinnu
noun. starry twilight
A word appearing as N. lhum “shade” in The Etymologies of the 1930s, derived from the root ᴹ√LUM, most notably an element in the name N. Hithlum (Ety/LUM). It was the cognate of ᴹQ. lumbe, and thus derived from primitive ✱lumbē, which explains why the final m survived as a reduction of mb.
Conceptual Development: The earliest iteration of this word was G. lôm {“pool, sl...” >>} “gloom, shade” from the Gnomish Lexicon of the 1910s, based on primitive ᴱ✶lou̯me (GL/54) and probably derived from the early root ᴱ√LOMO as suggested by Christopher Tolkien (LT1A/Hisilómë). In this early document, G. lum or glum was “a cloud” (GL/55), likely a derivative of ᴱ√LUVU for “✱dark weather” as also suggested by Christopher Tolkien (LT1A/Luvier). In Noldorin Word-lists of the 1920s Tolkien had ᴱN. {lom >>} lhom “shadow” (PE13/149). This became N. lhum “shade” in The Etymologies, as noted above.
Neo-Sindarin: In later writings, Hithlum was designated North Sindarin and its final element was based on a loan from Q. lómë “dusk”, with the m surviving only because it was from the North dialect (PE17/133; WJ/400). However, the root √LUM “shadow, darkness” also survived in later writings (PE17/168), so I think N. lhum “shade” can be salvaged, though if adapted to Neo-Sindarin it would need to become ᴺS. lum as suggested in HSD (HSD). Given the later use of Q. lumbo for “(dark) cloud”, I think the Gnomish sense G. lum “[dark] cloud” can be salvaged as well.