VCV pattern in Persian phonology
In the transition of Persian from Old Persian (OP) to Middle (MP) and finally New Persian (NP), there is a significant phonemic change: reduction of VCV to V (V = vowel; C = consonant). That is to say, VCV reduces to either V's of VCV and consequently, C and the other V disappear:
|Avestan or Old Persian||Middle Persian||New Persian|
|khshâyathiya||shâha —> shâh||shâh|
New Persian being more than 1100 years old, has also experienced this pattern. There are many reductions both in the standard dialect and regional dialects. Interestingly, in some dialects a different V has been picked out, resulting in having, for example, «minam» and «monam» from «mikonam».
|mitavânam||mitânam —> mitunam||khâsiye||khâye|
 This phonemic rule can help us in retrieving the older form of words. I found khâsiye in a dictionary about the dialect spoken in Shahr-e Bâbak and its neighboring regions. khâsiye should be the older form of khâye.