§ Elements in Quenya and Sindarin Names The Silmarillion

andúnë 'sunset, west' in Andúnië, to which corresponds in Sindarin annun, cf. Annúminas, and Henneth Annun'window of the sunset' in Ithilien. The ancient root of these words, ndu, meaning 'down, from on high', appears also in Quenya numen 'the way of the sunset, west' and in Sindarin dun 'west', cf. Dúnedain, Adûnaic adunin Adunakhôr, Anadûnë was a loan from Eldarin speech.