Short end of the stick, so to speak...

[Eladar]

Dwarves -> real rebirth as children


Here is another version from Peoples of Middle-earth, Last Writings

The Dwarves add that at the time Aule gained them also this priviledge that distinguished them from Elves and Men: that the spirit of each of the Fathers (such as Durin) should, at the end of the long span of life allotted to Dwarves, fall asleep, but then lie in a tomb of his own body, at rest, and there its weariness and any hurts that had befallen it should be amended. Then after long years he should arise and take up his kingship again.