The story
- Irish · derived fromnasc“link, bond”
- English todayNazgul
From nazgûl (“ringwraith”) in J. R. R. Tolkien's fictional language Black Speech, a compound of nazg (“ring”) and gûl (“wraith; evil spirit”). Tolkien thought it “probable” that the former term nazg was “actually derived from” Irish nasc (“link, bond”), though not borrowed consciously. For the latter term gûl compare ghoul.
Etymology from Wiktionary, CC BY-SA 4.0.