نقش مشخصه [گستردگی چاکنای] در رفتار واجی سایشی‌های زبان فارسی

The contrastive function of [spread glottis] in the description of stops and fricatives has been approved in many languages, such as English, but its role in the phonological behavior of Persian stops, not fricatives, has been discussed yet. This paper based on Glottal timing theory shows that regarding this laryngeal feature in the description of Persian fricatives has got phonetic plausibility. By taking its contractiveness into account, Persian phonetic possibilities, then, regarding this feature has been dedicated in the framework of derivational approach. The results also show that applying this feature brings more economic and efficient analyses about some superficial unrelated phonological processes such as spirantisization of velar stop, fricativization of aspirated onsets and postfricative voicing based on autosegmental and optimality theoreis. This is why this paper suggests that voiceless fricatives together with voceless stops would form a natural class based on the shared feature, that is [+spread], and their voiced counterparts form a natural class due to shared [-spread] as well.