The article analyses the Church Slavonic vocabulary, which in the Ukrainian language, according to etymological dictionaries, were gone in different ways: 1) directly from the Church Slavonic language or through the literary language of the period of Kievan Rus; 2) from the Church Slavonic language through other languages: Russian, Czech or Slovak; 3) from the Church Slavonic language by the method of tracing; 4) from other languages through Church Slavonic mediation: from Ancient Greek, from Middle Greek, from Modern Greek, from Latin, from Turkic, from Hebrew, from German. The relevance of the article is determined by the need of a comprehensive analysis of Church Slavonic, which is an organic component of the Ukrainian language. The urgency of this issue in modern Ukrainian linguistics is due not only to its insufficient coverage and a certain fragmentation of the results, but also to the fact that in addition to linguistic and historical and cultural aspects, it has a certain rehabilitation orientation. The following scientific methods were used in the study: descriptive, comparative, statistical. The scientific novelty of the work is that for the first time the linguistic and extralinguistic factors of the appearance of Church Slavonic borrowings in the modern Ukrainian language, the main ways of entry of Church Slavonic into the Ukrainian language are systematically described. The results of the work show that discussions on the emergence of Church Slavonic in the Ukrainian language continue among industry experts and linguists.