The aim of this article is to demonstrate that Khotanese ysare ‘old age’ is derived from the n-stem noun *zaru̯an– and thus results from a reconstructed nom.sg. *zaru̯āh, with recharacterisation of the nom.sg. marker *-h on the expected outcome *zaru̯ā < *-ōn < pre-PIE *-on-s. The article also discusses other nouns that testify the development of Proto-Iranian *-u̯āh in word-final position and argues that, in postconsonantal position, *-u̯āh first evolved into long *-ē [eː], preserved as such in accented monosyllables, and then developed into short –e in polysyllabic words.