A lake in northern Eriador, translated “Lake Evendim” (LotR/1111) or more literally “Water of Twilight” (RC/773). This name is a combination of nen “water” and uial “twilight” (SA/nen, uial).
Conceptual Development: When it first appeared in Lord of the Rings drafts from the 1940s, N. Nenuial was translated “Evendimmer” (SD/76).
nen (“water”) + uial (“twilight”)