_ n. _snake.
Sindarin
lhûg
noun. reptile, snake, serpent, worm, reptile, snake, serpent, worm, *lizard; [N.] dragon
leweg
noun. snake
lhûg
noun. snake, serpent
lýg
noun. snake
_ n. Zoo. _snake. Q. leuka.
lŷg
noun. snake
lŷg
noun. snake
The best known Sindarin word for “snake”, appearing in Appendix E of The Lord of the Rings (LotR/1115). In 1964 notes on Dalath Dirnen (DD), Tolkien said it was derived from the root √LEWEK “worm” (PE17/160), likely from ✱leukā where the ancient eu became ȳ as was usual in Sindarin (LotR/1115).
lŷg
snake
- lŷg (constuct lyg), no distinct pl. form. 2) lhûg (construct lhug, with article ?i thlûg or ?i lûg the lenition product of lh is uncertain) (dragon, serpent), pl. lhuig (?i luig). See SERPENT.
A noun in Quenya Notes from 1957 (QN) derived from primitive ✶(s)lōkō “reptile, snake, worm” based on the root √LOK “bend, loop”, so presumably having a similar meaning (PE17/160). Christopher Tolkien also had lhûg in The Silmarillion appendix, but gave it the glosses “snake, serpent” (SA/lok).
Conceptual Development: In the Gnomish Lexicon of the 1910s, Tolkien had G. ulug “dragon” (GL/74), and in the contemporaneous Official Name List for the Lost Tales and the Name-list to the Fall of Gondolin he had G. lug or lûg “snake” (PE13/105; PE15/28). In The Etymologies of the 1930s, Tolkien had N. lhûg “dragon” under the root ᴹ√LOK “great serpent, dragon” (Ety/LOK), where initial l was unvoiced to lh as was usual in Nodorin. This was no longer true of Sindarin of the 1950s and 60s, so Sindarin lhûg required a primitive from ✶slōk- and a corresponding Quenya form of hlócë.
Neo-Sindarin: Given the breadth of its glosses, I would assume this word can apply to any sinuous reptilian creature with or without legs, including lizards, snakes and dragons.