The great hall of Thingol (PM/371), translated “Heaven-dome” (PM/376), a combination of menel “the heavens” and rond “dome”.
Sindarin
Menelrond
noun. heaven-dome
menelrond
place name. Heaven-dome
Elements
Word Gloss menel “the heavens, firmament, region of the stars” rond “(vaulted or arched) roof; vaulted chamber or cavern; heavens [as a roof of the world]”
menel (“sky, high heaven”) + rond (“domed roof”)