ilwë noun "sky, heavens" (LT1:255), "the middle air among the stars" (LT1:273). VT49:51, 53 also mentions an obscure prononominal element ilwë.
Quenya
hellë
sky
ilwë
sky, heavens
nixë
frost
nixë noun "frost" (WJ:417); previously described as a synonym of niquis "ice-flake or snowflake", q.v. (PE17:168)
hellë noun "sky" (3EL; a distinct word hellë "frost" was struck out, see KHEL.)