The present study intends to investigate, describe and elucidate the existing phonological processes in Mashhadi dialect through applying a descriptive-analytic approach. Assimilation (adaptation of two consonants or two vowels), dissimilation, elision, addition, metathesis, and alternation are processes which have been assessed in this article. These processes are only discussed at the phonological level and do not make semantic shifts. They are mostly the consequence of people’s tendency to have more facility and fluency in using language. The achieved findings indicate that elision and alteration are the most frequent processes which occur in Mashhadi dialect. On the other hand, dissimilation is the least frequent one.

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