From Tolkien Gateway
A rejected version read: "KARAK- tooth, spike, peak. Q karka".
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, Part Three: "The Etymologies", p. 362 (root appearing as "KARAK-")
- J.R.R. Tolkien, "Addenda and Corrigenda to the Etymologies — Part One" (edited by Carl F. Hostetter and Patrick H. Wynne), in Vinyar Tengwar, Number 45, November 2003, p. 19