Quenya 

andúnë

sunset, west, evening

andúnë noun "sunset, west, evening" (NDŪ, Markirya, SA), also in Namárië: Andúnë "West" (but the standard Quenya translation of "west" is Númen) (Nam, RGEO:66) Cf. andu- in Andúnië, Andúril.