The monograph comprehensively covers the phonetic and grammatical structure of the classical Armenian language. The author makes an attempt to take a new approach to solving a number of problems associated with word formation and formation of the studied language. The study is conducted with an analysis of comparative studies on the relationship of Armenian with other Indo-European languages ​ ​ and their own interpretation. In general, the work is a theoretical generalization of the achievements of modern and foreign science in the field of studying the ancient Armenian language.