Another name for Anfauglith (S/153), translated “Land under Choking Ash” (WJ/239-240). This name is a combination of dôr “land”, nu “under”, faug “thirsty” and lith “ash” (SA/faug, lith).
Conceptual Development: In the Lays of Beleriand from the 1920s, this name was first writen G. Dor na Maiglos, soon revised to ᴱN. Dor-na-Fauglith with na “of” instead of nu “under” (LB/49). In the Lays, this name was translated as “Thirsty Plain” or “Land of Thirst” (LB/39, 275). The name N. Dor-na-Fauglith was retained in Silmarillion drafts from the 1930s, variously translated as “Plain of Thirst”, “Land of Gasping Thirst” and “Land of Thirst” (SM/26, LR/132, LR/280). In Silmarillion revisions from the 1950s-60s, Tolkien revised the name to Dor-no-Fauglith >> Dor-nu-Fauglith, and modified the translation to “Land under Choking Ash” (WJ/239-240).
(n-)dôr (“land, dwelling”) + nu (prep. “under”) + faug (“thirst”) + lith (“ash, sand, dust”)