Another name of Dimrost, translated “Shuddering Water” (S/220), a combination of nen “water” and girith “shuddering” (SA/nen, girith).
Conceptual Development: This name was already N. Nen Girith in Silmarillion drafts from the 1930s (SM/130, 313; LR/140).
nen (“water”), girith (“shuddering, horror”)