Orodruin

noun. mountain of blazing fire

orod (“mountain”) + ruin (“fiery red”)

orodruin

place name. Mountain of Fire

A name of Mount Doon translated “Fire-mountain” (LotR/61) or “Mountain of Fire” (LotR/899). This name is a combination of orod “mountain” (Ety/ÓROT) and ruin “red flame” (SA/orod, ruin).

Conceptual Development: When it first appeared in Lord of the Rings drafts from the 1940s, this name was already N. Orodruin “Fire-Mountain” (TI/28), though Tolkien did consider the form Orodnaur (TI/39).

Elements

Word	Gloss
orod	“mountain”
ruin	“red flame; fiery red”

Orodruin

Orodruin

Orodruin is glossed as "burning mountain" and "mountain of the red flame". The name likely consists of orod ("mountain") + ruin ("fiery red").