All the lands were grey and still; and ever the shadow deepened before them, and hope waned in every heart.
Day was waning.
For the main wall of the City was of great height and marvellous thickness, built ere the power and craft of Numenor waned in exile; and its outward face was like to the Tower of Orthanc, hard and dark and smooth, unconquerable by steel or fire, unbreakable except by some convulsion that would rend the very earth on which it stood.
For that they had found no cure; and indeed the span of their lives had now waned to little more than that of other men, and those among them who passed the tale of five score years with vigour were grown few, save in some houses of purer blood.
There are no more uses of "wane" in the book.
Show samples from other sources
Our passion has waned over the years, but our love has grown.
The moon was waning, but I could still see the trail.