Another name for Martalmar in cosmological notes from the 1930s (SM/241), a combination of the plural of talma “root” and the genitive of Ambar “world” (Ety/TAL).
Qenya
martalmar
place name. Roots of the Earth
talmar ambaren
place name. Roots of the Earth
The “veins of the world” in some cosmological notes from the 1930s (SM/241-2, 255), also appearing in The Etymologies as combination of mar “world” and the plural of talma “root” (Ety/TAL).