This article deals with the problems of linguo-etiquette and the usage of etiquette formula, the most important of which is address in "Kobzar" by Taras Shevchenko. The article deals with the stylistic effect of the address in T. Shevchenko's poetry. The addresses expressed by vocative Case are considered. In the article eight different lexical groups of the address are selected. The meanings of these words, their stylistic function in the texts are described. The article is dedicated to the words with the fonnants. The attention is focused of the functions of suffixes. The article traces with peculiarities of T. Shevchenko's language and style.