S. Mithrim loc.
A lake in northwest Beleriand (S/106) named after the Elves who lived there (WJ/378). This name was the inspiration for Q. Sindar (PE17/140), and is a combination of mith “grey” and the class-plural suffix -rim (SA/mith, rim).
Conceptual Development: In the earliest Lost Tales, this lake was called G. Asgon (L1T1/238, GL/20), revised to ᴱN. Mithrim towards the end of the tales (LT2/202). The form N. Mithrim appeared in Silmarillion drafts from the 1930s (SM/4, LR/249), and also in the Etymologies, but with its first element being N. mith² “white fog, wet mist” and its second element N. rhim² “cold pool or lake (in mountains)”, hence “*Mist Lake” (Ety/MITH, RINGI). The derivation from the name of the people came later (WJ/378), perhaps inspired in the real world by Q. Sindar, the reverse of the inspiration in the fictional world.
References ✧ PE17/140; SA/mith, rim; SI; UTI; WJ/378; WJI
|mith||“grey, light grey, pale grey”||✧ SA/mith|
|-rim||“collective or group plural”|
|rim||“host, great number, people (of one kind or origin)”||✧ SA/rim|
N. Mithrim loc. “*Mist Lake”
References ✧ Ety/MITH, RINGI; LRI; RSI; SMI/Asgon, Mithrim
|mith²||“white fog, wet mist”||✧ Ety/MITH|
|rhim²||“cold pool or lake (in mountains)”||soft-mutation||✧ Ety/RINGI|
ᴱN. Mithrim loc.
References ✧ LBI; LT1I/Asgon; LT2/202; LT2I/Asgon, Mithrim; PE13/152
|rhim||“ring, circle”||✧ PE13/152|
G. Asgon loc.
References ✧ GL/20; LT1A/Asgon; LT1I; LT2/202; LT2A/Asgon; LT2I/Asgon, Mithrim; PE13/101, 108; PE15/20; SMI