System Relations of Russian Homonymic Prepositions '<i>за</i>'
Systematic relations characteristic of meaningful words can also be discovered among auxiliary parts of speech, including prepositions. The article provides facts demonstrating that the prepositions <i>за</i> governing the accusative and the instrumental cases respectively are homonyms. The aforementioned lexical prepositions <i>за</i><sup><i>1</i></sup><i></i> and <i>за</i><sup><i></i>2</sup> are capable of synonymic relationships and can organize antonymous pairs.