Middle Gujarati (AD 1500–1800), split off from Rajasthani, and developed the phonemes ɛ and ɔ, the auxiliary stem ''ch''-, and the possessive marker -''n''-.
Major phonological changes characteristic of the transition between Old and Middle Gujarati are:
*i, u develop to ə in open
syllables
*
diphthong
A diphthong ( ; , ), also known as a gliding vowel, is a combination of two adjacent vowel sounds within the same syllable. Technically, a diphthong is a vowel with two different targets: that is, the tongue (and/or other parts of the speech ...
s əi, əu change to ɛ and ɔ in initial syllables and to e and o elsewhere
*əũ develops to ɔ̃ in initial syllables and to ű in final syllables
These developments would have grammatical consequences. For example, Old Gujarati's instrumental-locative singular in -i was leveled and eliminated, having become the same as Old Gujarati's nominative/accusative singular in -ə.
References
Gujarati language
Cultural history of Gujarat
Indo-Aryan languages
Languages attested from the 15th century
{{IndoAryan-lang-stub