cirinci ("k"), sg. *cirincë, noun: a species of birds, "no bigger than wrens, but all scarlet, with piping voices on the edge of human hearing" (UT:169). The word seems to incorporate the diminutive ending -incë.
Quenya
cirincë
noun. scarlet-plumed species of bird
Elements
Word Gloss KIR “cut, cleave, pass swiftly through; shave; skim (surface), slip along, glide quickly” -incë “diminutive ending”
cirinci
no bigger than wrens, but all scarlet, with piping voices on the edge of human hearing
A species of Númenorean bird that Tolkien described as “no bigger than wrens, but all scarlet, with piping voices on the edge of human hearing”, appearing only in its plural form kirinki (UT/169; NM/337). It is not clear what, if any, terrestrial species it equated to. It might be a diminutive form based on √KIR “cut”, so perhaps literally “✱little cutter”.