An adjective for “bent, curved” in notes associated with the Markirya poem of the 1960s, related to the verb Q. kúna- “to bend” (MC/223).
Neo-Quenya: In a post on 2024-09-21 in the Vinyë Lambengolmor Discord Server (VLDS), Luinyelle suggested this word might also mean “concave”; compare G. cûn “bowed, bent, concave” (GL/27).
cúna ("k") 1) adj. "bent, curved", from which is derived 2) cúna- vb. "bend", occurring with a- prefix (changed by Tolkien from a na-prefix) in Markirya. Here cúna- is intransitive; we do not know whether it can also be transitive "bend".