In his Appendix to The Silmarillion, Christopher Tolkien noted the Elvish element or root pel- (signifying "go round, encircle"). It is unknown if he reconstructed this element from writings by Tolkien which have appeared in print after 1977 (when the work was first published), or if he used manuscripts which still are unpublished.
In the Qenya Lexicon appears the root PELE, signifying "fence in".
- J.R.R. Tolkien, "Words, Phrases and Passages in Various Tongues in The Lord of the Rings", in Parma Eldalamberon XVII (edited by Christopher Gilson), pp. 65, 92, 171 (roots appearing as "√PEL", "PEL", "√PELE)"
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Appendix: Elements in Quenya and Sindarin Names"
- J.R.R. Tolkien, "Qenyaqetsa: The Qenya Phonology and Lexicon", in Parma Eldalamberon XII (edited by Carl F. Hostetter, Christopher Gilson, Arden R. Smith, and Patrick H. Wynne)
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, Part Three: "The Etymologies", p. 380 (roots appearing as "PEL-", "PEL(ES)-")
- J.R.R. Tolkien, "Addenda and Corrigenda to the Etymologies — Part Two" (edited by Carl F. Hostetter and Patrick H. Wynne), in Vinyar Tengwar, Number 46, July 2004, p. 8