Nan Curunír is Sindarin for "Saruman's Vale", consisting of nan and Curunír. An early form of this name was Nan Gurunír.
Sindarin
nan curunír
place name. Valley of Saruman
Elements
Word Gloss nan(d) “vale, valley, vale, valley, [ᴱN.] dale; [N.] wide grassland; [G.] field acre” Curunír “Man of Skill”
Nan Curunír
Nan Curunír
Sindarin name of the Valley of Saruman (LotR/487), also translated “Wizard’s Vale” (LotR/552). It is a combination of nan(d) “valley” and Curunír “Saruman”.
Conceptual Development: In Lord of the Rings drafts from the 1940s, this name first appeared as N. Nan Gurunír (TI/420, WR/8), since at this stage both nouns and adjectives were lenited in this position.