ᴹ√YAK root. “*neck”
An unglossed root in The Etymologies of the 1930s with derivatives like ᴹQ. yat/N. iaeth “neck” (Ety/YAK). It might also be the basis for later Sindarin S. iach “ford” as in S. Arossiach “Ford(s) of Aros” (S/121, WJ/338).
Reference ✧ Ety/YAK
Derivatives