The following article is devoted to the process of adapting loanwords into the Russian language in the first half of 17th century. The material which was subject to analysis was extracted from the first, handwritten editions of Russian opinion journalism, written from 1600 to 1650. The purpose of the article is to present the process of absorbing loanwords on the phonetic and morphological level, and to record changes in word genders and resonance variants in the words internalized into Russian either originating directly from another language or passed on through one from other languages