The Mountains of Aman surrounding the land of the Valar (S/37). This name was translated as “Mountain Wall” (PE17/26) and “fencing or defensive heights” (WJ/403). It seem to be a combination of pelo “boundary (fence)” and the plural of oro “mountain”.
Quenya
Pelóri
fencing heights
pelóri
place name. Mountain Wall, Fencing Heights
pelóri valion
place name. Mountains of Valinor
Pelóri
Pelóri
The Quenya name Pelóri translates as "the fencing or defensive heights". In a manuscript, Tolkien connects the name to Quenya pelo ("a boundary (fence)") and pella ("beyond"), deriving from root PELE. Christopher Tolkien suggested that the first element derives from pel- ("fence, enclosure"). The second element is likely or, "mountain". The Pelóri were also called the Mountains of Aman and the Mountains of Defence.
Pelóri place-name "Fencing Heights", the mountains raised by the Valar to protect Aman (SA:pel, WJ:403)