A root in The Etymologies of the 1930s glossed “hang” and acting as an alternate explanation of ᴹQ. Laurelin, usually interpreted as “Song of Gold” but also meaning “Hanging Flame” as reflected in its Noldorin name Glingal (Ety/GLING, LIN², LING). The continued appearance of S. Glingal in later versions of The Silmarillion indicates this root likely remained valid (S/126).
A pair of forms ᴱQ. kinka- “to hang (intr.)” and ᴱQ. kinkata- “hang (tr.)” in the Qenya Lexicon of the 1910s imply the existence of a root ᴱ√KINIKI, which may be a precursor to ᴹ√(G)LINGI.
A root appearing in the Quenya Verbal System (QVS) from 1948 beside ᴹ√TAÑ of similar meaning, serving as the basis for the verb ᴹQ. linga- whose past form †linge is glossed “ring, twang - descriptive of plucked strings” (PE22/103). It probably refers back to ᴱQ. linga- “to hum like the string of a harp” from around 1930 (PE16/100), a verb used in the Earendel poem (MC/216).