[quote=""Valkrist""]My belief is that what happened to the Witch-king at that moment was no different than when Isildur cut off the One Ring from Sauron's finger and 'vanquished' him as well. Sauron did not die, though the whole world believed him dead, and likewise I don't think the Witch-king could truly ever be killed with finality until such time as the One was destroyed. Always in the past, after a defeat, it would take Sauron many, many years to regain form and strength after a major defeat, and given sufficient time, especially if Sauron had been able to regain the One, I have no doubt that the Witch-king would have returned. Sauron still held the Nine Rings, and with the One still in existence, the Nazgul were immortal, prophecy or not. Sadly for the Witch-king, the One Ring gets dumped in Mount Doom and he, along with the other eight, are undone forever. Still, had Frodo failed, I don't think Middle-earth would have seen the end of the Morgul Lord. It may have taken centuries, but I think he would have reformed eventually. Such was their power.
Now, this is just a theory, of course, and one that cannot be proven because the Ring was destroyed, but I'm going based on everything else Tolkien wrote about it and the Nine.
Doom means fate, and
fall does not necessarily mean death. Tolkien's choice of words for the prophecy may have been flowery, but it gives one enough pause to see if there is wiggle room between the lines, and given what is known about the Nine and their enslavement to the One while it endures, I don't think the Witch-king was killed in that moment, only his spectral body and ability to interact with the physical world undone for a long time to come. His spirit, like Sauron's, would have endured.
Either that, or Tolkien decided that it made for a better story to have him die. He wrote the books, he can break his own rules.
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That's an interesting theory, and one which I had sometimes cogitated, though never to the extent of putting it into words. Such a fate for the WK is hinted at in the book.
...and a cry went up into the shuddering air, and faded to a shrill wailing, passing with the wind, a voice bodiless and thin that died, and was swallowed up, and was never heard again in that age of this world.
That to me sounds consistent with a vanquished spirit quitting the field of battle.
[quote=""BladeCollector""]Great discussion! Say PJ is forgiven about everything, one thing that bothers me about the Nine in the Hobbit is, how does one go about chaining nine basically noncorporeal beings into tombs?[/quote]
Say PJ is forgiven for everything? Never!
But you raise an interesting point: how physical are the wraiths? Tolkien is a little vague on it. He goes to great pains to refer to their wearing of the cloaks to give shape to their nothingness, and also states through Gandalf that after the flooding of the Ford that they would have to return to Sauron,
empty and shapeless. Such language suggests they are nothing more than spirits. However, can a spirit wear a cloak, outside of an Anne Rice novel anyway? It seems like they must have some physicality for them to be able to inhabit the cloak and hold it up off the ground, for the WK to wield the Morgul-blade, for one of the Nine to fire the dart that fells Faramir's horse outside the City, and so forth. I suspect some of Tolkien's references to emptiness, nothingness, and so forth are an allusion to spiritual emptiness, that they are devoid of any semblance of goodness.
At the end of the day, the concept that they died and were entombed by the Dunedain is so far outside the canonical nature of the Nazgul that it is pointless to speculate about how they could have been imprisoned within the tombs. Once PJ introduces the concept that they died, he has created something that only seems to be a Nazgul and instead is governed by whatever whims PJ, FW, and PB can come up with.