This paper is based on a principle that the language is always in a continuation with its previous state. The Historical Dictionary of Slovak Language, whose seventh volume was finished in the 2008, can be seen as a clear evidence of this. The dictionary includes a vocabulary from pre-literary period, i.e. from 11th up to 18th century, until the first Slovak literary language codification performed by Anton Bernolak. The authoress of the paper provides an analysis of the vocabulary of pre-literary period as well as characteristics of the Slovak language starting off an occurrence of Slovakims in the Latin texts and ending up with the Slovak language pre-literary forms, the so-called Cultural Slovak of 16th - 18th centuries. The paper also presents influences of several other languages such as Czech, Latin and German etc. on Slovak. Furthermore, the authoress compares the whole anterior period of Slovak language development with a contemporary period, showing the similarities as well as differences.