ᴹ√LIT root. “*(fine) grit”
An unglossed root in The Etymologies of the 1930s with derivatives ᴹQ. litse/N. lith “sand” (Ety/LIT). Elsewhere N. lith was translated “ash” (TI/208), so perhaps the meaning of the root was something like “*(fine) grit”. Tolkien’s continued use of S. lith “ash” indicates its ongoing validity (RC/765; SA/lith).
References ✧ Ety/LIT, PHAU