A noun in The Etymologies of the 1930s given as the equivalent of ᴹQ. vilwa “lower air” under the root ᴹ√WIL (Ety/WIL). Since ᴹQ. vilwa was changed to wilma, I’d abandon this word and use N. gwilith instead.
Noldorin
gwelw
noun. air (as a substance)
gwelw
noun. air (as substance)
gwelwen
noun. air, lower air (distinct from the upper air of the stars, or the outer)
gwelwen
noun. air, lower air
gwilith
noun. air (as a region)
lhind
noun. air, tune
lhinn
noun. air, tune
A noun appearing in The Etymologies of the 1930s as N. gwelw “air (as a substance)” derived from primitive ᴹ✶wilwā under the root ᴹ√WIL “fly, float in air” (Ety/WIL).
Conceptual Development: An earlier precursor is G. gwail “air” in the Gnomish Lexicon of the 1910s, derived from the early root ᴱ√gu̯il (GL/45).
Neo-Sindarin: If adapted to Neo-Sindarin, this word would be ᴺS. gwelu as suggested in HSD (HSD).