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.
place name. Aros
- N. Iaros ✧ Ety/YAR
Word Gloss arn “red” -os “abstract ending”