Abstract
This article discusses diachronic changes in the vocabulary of the English language. The language system is constantly moving and evolving. The most mobile level is the lexical system since it is it that primarily reacts to all changes in society. In this article, the correlation between the original, proper English, and borrowed vocabulary of the English language in the process of its historical development is studied on the material of the lexicographic sources studied. The qualitative-quantitative dynamics of the variation of borrowed vocabulary are analyzed, taking into account the source languages within the considered periods of the development of the vocabulary of the English language. The most priority socially determined lexico-semantic group of the main parts of speech is presented, taking into account their dominance in various periods of the development of the English language; Also, in this article, an etymological analysis of the main parts of speech in the English language is carried out, and general and particular trends of their etymological development are identified in this lexicographic material.