عنوان مقاله [English]
Compensatory lengthening is the lengthening of a vowel sound that happens upon the loss of a following consonant. This phenomenon is common in many dialects and languages. The purpose of this research is the study of compensatory lengthening in Taibadi dialect base on optimality theory. This dialect is used by residents of the city of Taibad and some villages near this city, located 225 km south-east of Mashhad, in Khorasan Razavi province. The data were collected through a descriptive-analytical method from ten native speakers of Taibadi dialect by using a questionnaire. By analyzing the data in the framework of the principles of optimal phonology, the most important constraints on the optimal forms of Taybadi dialect were specified in terms of compensatory lengthening. Based on the results, this process in Taibadi dialect can be created in four different ways. Deletion of glottal fricative and glottal stop in both the middle and final position as well as the deletion of rolling "w" cause the lengthening of the consonant's next vowel. Additionally, in some cases, the deletion or shortening of a vowel can lead to the lengthening of the adjacent consonant, or intensification. Although Moorai theory can better explain this process, all of these cases can be explained by optimality tables.