The study of infinitives position and ancient, rare and obsolete Persian verbs in Qur’anic encyclopedia

From the beginning of the fourth century to the early seventh century the Dari Persian language which was the literary, official and spoken language in Iran, has gathered in itself an extensive treasure of the noble and archaic words, many of which have been formed based on various geographical dialects or loan terms that have found their in to the Dari Persian from the languages of the surrounding areas, particularly the East region of Iran.  In the Quranic Encyclopedia, which is provided on the basis of one hundred and forty-two versions of Quran manuscripts for the equivalent Persian of Quranic words, we encounter an abundance of infinitives and verbs which are archaic ,rare, and obsolete, and often related to the specific dialects of types of  Persian dialects  which are called language species. The exploration of these pure and rare words contribute to the study of the historical process of lexical system of Persian language and it is conducive to the enrichment of lexical dictionaries and atlases and also some of these words deserve to return to the Persian language cycle . This study tries, by means of descriptive-analytical approach and library study while introducing the infinitives and ancient, rare and obsolete Persian verbs in Quranic encyclopedia and rendering their frequency, with the selection of a number of these original language species, to explore and analyze their functions.