There are certain monosyllabic stems ending in diphthongs, which are far too few and too diverse in infliction to make a declension of, and which may be most appropriately disposed of here, in connection with the stems in ī and ū, with which they have most affinity. They are:

a. stems in āu: nāú and glāú;

b. stems in āi: rāí;

c. stems in o: gó and dyó (or dyú, dív).