hindi ka vikas kaise huaa
Hindi evolved from the Sauraseni Prakrit. Though there is no consensus for a specific time, Hindi originated as local dialects such as Braj,Awadhi, and finally Khari Boli after the turn of tenth century (these local dialects are still spoken, each by large populations). During the reigns of the Delhi Sultanate and the Mughal Empire, which used Persian as their official language, Khari Boli adopted many Persian and Arabic words. As for the ultimately Arabic words, since almost every one of them came via Persian, their form in Hindi-Urdu does not preserve the original phonology of Arabic.