√LIN² root. “sing, make a musical sound”
@@@ Most of the attested derivatives of this root are actually developed from the medially strengthened form √LIND (appearing on WJ/382). It may be that other forms vanished due to conflicts with √LIN¹ “pool”.
Tolkien vacillated on the Sindarin form of this root. In The Etymologies, he considered and then rejected a N. variant ᴹ√GLIN. The variant √GLIN reappeared in the later essay “Quendi and Eldar” from 1959-60 (WJ/382) as the antecedent of archaic S. †Glinnel, the cognate Q., T. Linda, the tribal name the Teleri used for themselves.
If √GLIN is the Sindarin form of the root, then its Sindarin derivatives would have initial gl- instead of l-. However, evidence indicates most of the Sindarin derivatives begin with l- such as with the verb linna- “to sing” appearing in the poem “Elbereth Gilthoniel” in The Lord of the Rings. It is probably better to assume the normal form of this root is √LIN(D) in all the Eldarin languages, and that S. †Glinnel is an individual variation.
References ✧ PE17/27, 160; SA/lin²; UT/253; WJ/382, 411
ᴹ√LIN² root. “sing”
In The Etymologies, Tolkien considered a Noldorin variant of this root: ᴹ√GLIN with derivatives ᴹQ. lin-², N. glin- “to sing” and N. glinn¹ “song, poem, lay”. He rejected this variant, however, and its derivatives became ᴹQ. lir-, N. glir- and N. glaer or glîr, all from the root ᴹ√(G)LIR.
After this changes, all of the remaining derivatives of ᴹ√LIN² were actually derived from primitive ᴹ✶lind-; this seems to be the case with derivatives of this root in later writings as well.
References ✧ Ety/GLIN, LIN², TIN, TUY; EtyAC/GLIR, LIND