Words ending in -āy and -ūy in Persian old texts; Some practice in the techniques of pronunciation

By examining some of the socio-economical aspects of Persian poetry – especially the ways poets made a living and connected themselves to royal courts- attempt has been made in this article to identify some of the factors in creating poetical practice and criteria for official texts. It will be shown that certain uses made by poets did not follow their own natural language but conformed to the poetical norms and the standards of the official language of the time. Therefore, not in all cases can one determine the normal language of theirs and their time according to their uses in poetry.By examining individual cases of the application of the lexical item rūy/ rū, it will become clear which form/s of this item prevailed in the 4th-5th H/10-11 centuries. However, the main aim is to present rules and criteria that could be generalized to apply to other studies about the history of Persian language and its lexical changes.