(i ’welu), analogical pl. gwely (in gwely) if there is a pl. The attested form is archaic gwelw (LR:398 s.v. WIL). Hence the coll. pl. is likely ✱gwelwath, if there is a coll. pl..
Sindarin
gwelu
noun. air (as substance)
lind
noun. air, tune
gwelu
air
gwelu
air
gwelu
noun. air (as a substance)
gwelwen
air
1) (as a region) gwelwen (i **welwen), pl. gwelwin (in gwelwin), also gwilith (i **wilith), no distinct pl. form except with article (in gwilith)
gwelwen
air
(i ’welwen), pl. gwelwin (in gwelwin), also gwilith (i ’wilith), no distinct pl. form except with article (in gwilith)
lind
air
3) (of music) lind (song, tune; singer, in the latter sense also used of rivers), no distinct pl. form, but coll. pl. linnath (WJ.309)
lind
air
(song, tune; singer, in the latter sense also used of rivers), no distinct pl. form, but coll. pl. linnath (WJ.309)
2) (as substance) gwelu (i **welu), analogical pl. gwely (in gwely) if there is a pl. The attested form is archaic gwelw** (LR:398 s.v. WIL). Hence the coll. pl. is likely *gwelwath, if there is a coll. pl..