A word in the Quendi and Eldar essay from 1959-60 for “crow”, derived from primitive ✶k(a)wāk (WJ/395). In notes from the late 1960s Tolkien instead had Q. {koake >>} quácë “frog” < ✶kāwāk, with primitive ✶kā for “crow” (VT47/36).
See ᴹQ. korko for a discussion of earlier forms.
quáco ("q")noun "crow" _(WJ:395; _Etym also has corco, q.v.)