The name of a land mentioned in Galadriel’s Namárië poem (LotR/337). In one place, Tolkien said it was the “name of a mythical region of shadows lying at outer feet of the Mountains of Valinor” (PE17/72). This name is a compound of sinda “grey” and nórë “country”, with the suffix -ië¹ common in abstract nouns. In another note Tolkien said that sindanórië was an archiac formation that meant “land of greyness” and was equivalent to sindie-nóre (PE17/72), so perhaps the -ië suffix at the end was actually associated with the adjective sinda “grey”.