liria-

verb. to sing

glir-

verb. to sing, trill, to recite a poem

The form glin in the Etymologies is a misreading according to VT/45:15

glin-

verb. to sing

glîr

noun. song, poem, lay

lhaer

noun. song, long lay

lhîr

noun. song, poem, lay

lir-

verb. to sing, to sing, [ᴹQ.] chant

liru-

verb. to sing, to sing (gaily)

filincë

noun. finch

A word for “finch” appearing in Primitive Quendian Structure: Final Consonants from 1936 and Common Eldarin: Noun Structure from the early 1950s, derived form the root √PHILIK (PE21/56, 72). See also ᴹQ. filit “sparrow, small bird”.

Conceptual Development: In the early 1930s document Declension of Nouns, Tolkien gave ᴹQ. liri for “finch”.

lin-

verb. sing

[lin- (2) vb. "sing" (GLIN, struck out)]

lindë-

verb. sing

lindë- vb. ?"sing" (LT1:258; in LotR-style Quenya lir- or #linda-)

lírë

song

lírë noun "song", stem #líri- in the instrumental form lírinen "in [the] song" or *"by [the] song" (Nam, RGEO:67)

lírë

noun. song

glin(d)

root. sing

lind

root. sing

philik

root. finch, finch, [ᴹ√] small bird

This root first appeared as ᴹ√PHILIK “small bird” in The Etymologies of the 1930s with derivatives ᴹQ. filit and N. fileg of the same meaning (Ety/PHILIK). The root also appeared in the contemporaneous Primitive Quendian Structure: Final Consonants with an extra gloss “sparrow”, a deleted variant spilik-, and some additional (unglossed) derivatives ᴹQ. filinke and N. flinc (PE21/56). The root and these last two derivatives reappeared in Common Eldarin: Noun Structure from the early 1950s, in this document with the gloss “finch” (PE21/71-72, 80-81). Note that a likely early precursor to all these words was G. bilinc “sparrow, bird (small)” (GL/23).

Neo-Eldarin: For purposes of Neo-Eldarin, I think it is best to assume the root √PHILIK = “small bird”, with ᴹQ. filit/N. fileg = “sparrow” and Q. filincë/S. flinc = “finch”.

philinki

noun. finch

aerlinn

noun. (unknown meaning, perhaps a song about the sea, or possibly holy song)

flinc

noun. finch

A word for a “finch” appearing in Common Eldarin: Noun Structure of the early 1950s, derived from primitive ✶philinki (PE21/72, 81). N. flinc also appeared in Primitive Quendian Structure: Final Consonants from 1936, but there the word was unglossed.

laer

noun. song, long lay

laer

noun. song

linna-

verb. to sing

linna-

verb. sing

linnathon

verb. I will sing, I will chant

linnon

verb. I sing

lîr

noun. song, poem, lay

glir

sing

1. glir- (i **lîr, in glirir) (recite poem), 2) linna- (i linna, i linnar**) (chant)

glir

sing

(i ’lîr, in glirir) (recite poem)

glîr

song

1. glîr (i **lîr, construct glir) (poem, lay), no distinct pl. form except with article (in glîr), coll. pl. glíriath. 2) laer (no distinct pl. form). Note: a homophone means ”summer”. 3) lind (air, tune; also = singer, in the latter sense also used of rivers), no distinct pl. form (WJ.309). See also HYMN regarding the word aerlinn**.

glîr

song

(i ’lîr, construct glir) (poem, lay), no distinct pl. form except with article (in glîr), coll. pl. glíriath. 2)  laer (no distinct pl. form). Note: a homophone means ”summer”. 3) lind (air, tune; also = singer, in the latter sense also used of rivers), no distinct pl. form (WJ.309). See also

linna

sing

(i linna, i linnar) (chant)