hel-

verb. to freeze (of water)

hellë

sky

hellë noun "sky" (3EL; a distinct word hellë "frost" was struck out, see KHEL.)

ilwë

sky, heavens

ilwë noun "sky, heavens" (LT1:255), "the middle air among the stars" (LT1:273). VT49:51, 53 also mentions an obscure prononominal element ilwë.