Ilk. Aros loc.
A river in Doriath described as “a river with reddish water” (Ety/YAR). This name seems to include a variant of arn “red” or perhaps the root ᴹ√YAR, combined with the suffix -os “land” also seen in thalos.
See S. Aros for further discussion.
References ✧ Ety/YAR; LRI; SMI; TII
|*-os||“abstract ending”||✧ Ety/YAR (#-os)|
G. Aros loc.
Reference ✧ LT2I/Aros