Early Quenya
kalain(e)a
adjective. serene
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
kalain(e)a
adjective. serene
An adjective appearing as ᴱQ. kalaina or kalainea “serene” in the Qenya Lexicon of the 1910s under the early root ᴱ√KALA “shine golden” (QL/44). Kalaina also appeared in the contemporaneous Gnomish Lexicon as equivalent to G. glaim “serene, clear, fair (espec. of weather)” (GL/39), so it may originally have referred to clear weather.
Neo-Quenya: Since √KAL still referred to “light” in Tolkien’s later writings, I would retain ᴺQ. calaina “serene” for purposes of Neo-Quenya.