oiolairënoun. Ever-summer, ever-summer (a species of tree)
lairë (1) noun "summer" (Letters:283, VT45:26), in the calendar of Imladris a precisely defined period of 72 days, but also used without any exact definition (Appendix D). Oiolairë "Eversummer", name of a tree (UT:167), see also Coron Oiolairë. Lairelossë noun *"Summer-snow", name of a tree (UT:167), perhaps with white flowers.
Ellairë alternative name of June (PM:135); evidently incorporating lairë "summer"; the el- part is probably an assimilated form of er-, an element meaning one or first, June being the first summer month.
oio noun "an endless period" (CO) or adv. "ever" (SA:los). Oiolairë "Ever-summer" (name of a tree, UT:167; also in the name Coron Oiolairë, "Mound of Ever-summer". Oiolossë "Everwhite, Ever-snowwhite", a name of Taniquetil (OY), hence the translation "Mount Everwhite" in Tolkien's rendering of Namárië. See also SA:los. Explicit "mount" in Oron Oiolossë "Mount Everwhite" (WJ:403). Ablativic genitive Oiolossëo "from Mount Everwhite" in Namárië (Nam, RGEO:67, OY)