This root appeared (unglossed) in the Qenya Lexicon of the 1910s as the basis for the words ᴱQ. kaïkta- “strangle” and ᴱQ. kailen “throat, gullet” (QL/46). The Ẏ indicates derivation from an ancient palatal spirant [c] or [ɟ] (PE12/15-16). There is no sign of this root past the 1910s.
Reference ✧ QL/46