Early Quenya
karneambar
noun/adjective. robin, (lit.) red-breast
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!
A word appearing as ᴱQ. karneambar “robin” in both the Qenya Lexicon and Poetic and Mythological Words of Eldarissa of the 1910s, a combination of ᴱQ. karne “red” and ᴱQ. ambar “breast” (QL/48; PME/49). Somewhat oddly, Tolkien specified this word was both “adj. or noun”, but then hinted at a specifically adjectival form ᴱQ. [[eq|[karneambar]a]] by adding -a on the line below it.
Neo-Quenya: I would adapt this word as ᴺQ. carniambos “robin, (lit.) red-breast” for purposes of Neo-Quenya, combining Q. carnë (carni-) “red” with ᴺQ. ambos “breast”.