EN
The object of attention in the present survey are derivative lexical units, formed with the prepositional morpheme anti-, e.g. 'antistres', 'antiBSP', 'antiKosmos', which haven't been regulated by a rule and haven't been referred in the lexical code practice yet. In this article, the way of forming and the category characteristic of the new language units with the formant 'anti-' are studied, as well as the functions of some derivatives with 'anti-' in a text. From the observation on the language material and as a result of word formation analyze of the lexical units with prepositional morpheme 'anti-', it was specified that some derivative words have changing category nature. On the base of the obtained results, the rules are proposed for unifying the way of spelling of the derivatives from discussed type.