Taniquetil, the mountain of Everlasting Whiteness (somewhat conjectural)

Taniquetil was the tallest of all the mountains of the world, rising up out of the sheer range of the Pelóri on the eastern edge of Aman. Among the snows of its high peak was built Ilmarin, the halls of Manwë the Elder King and his consort Varda, from which they looked out across the world. That peak had many names, and one of those names in Quenya was Oiolossë, from oio, 'everlasting, eternal' and lossë, 'snow white'. 'Everlasting Whiteness' is one translation of this name, but it is also sometimes rendered 'Ever-snow-white', and by extension Taniquetil is occasionally referred to as 'Mount Everwhite'.