Quenya 

lossëa

snow-white

lossëa adj. "snow-white" (so in VT42:18; this would be an adjective derived from lossë "snow", but elsewhere, Tolkien implies that lossë itself can also be used as an adjective "snow-white"; see lossë #1 above)

lossëa

adjective. snowy, (snow) white

A word for “snowy” or “snow-white”, an adjective form of lossë “snow” (PE17/161; VT42/18). In one place it was simply glossed “white” (PE17/71), though in most places the generic Quenya word for “white” is ninquë.

Conceptual Development: In some poems from written around 1930, Tolkien used similar words for “white” in a couple places, for example in the phrase ᴱQ. ondoli losse karkane “the white rocks snarling” from the Oilima Markirya poem (MC/213); here the word for “white” might be the plural of an adjective ᴱQ. lossa as suggested by Gilson, Welden and Hostetter (PE16/84). An element losse “white” also appears in the phrase ᴱQ. losselie telerinwa “the white people of the shores of Elfland” from the Nieninqe poem (MC/216). However, for this most part in the earliest period, losse was use for “flower” words; see that entry for discussion.

Quenya [PE17/071; PE17/161; VT42/18] Group: Eldamo. Published by

sanomë tarnë olórin, aracorno, eomer, imrahil, mi mísë, mi telepta yo morna, mi laiqua yo ninquë, mi luinë, ta gimli mi lossëa

There stood Gandalf, Aragorn, Eomer and Imrahil in grey, in silver and black, in green and white, and in blue, and also Gimli in white