Exploring the historical development of Prasun via sound laws
Prasun has been regarded as the most divergent Nuristani language and there is evidence to suggest this is due to isolation from the other Nuristani languages and influence from Eastern Iranian languages rather than Indo-Aryan. The orthography in this post will be based on Buddruss & Degener (2017). For this post, we will assume that Prasun originally had penultimate stress, much like in earlier Nuristani before apocope. Pretonic syncope One salient feature of Prasun is the syncope of pretonic (pre-stress) vowels. This regularly happens in diachronically trisyllabic words, as the examples show below: PIIr. *ra u̯čas- "light" + *-ka- > Pr. ürǰ ˈ ug PIIr. *(H)ra u̯ana- "salt" (cf. OIA lavaṇa -) + *-ka- > Pr. wuẓn ˈ ug However, pretonic syncope does not apply if the pretonic vowel is * ā (< *ā/*aH): PIIr. *maHas- "moon" + *-iH- + *-kaH- > Pr. mas ˈ ig PIIr. *HaH + *b ʰ and ʰ- "to bind" > * āband- > * āmand- > Pr. amond- ...