This monograph deals with synchronous analysis of word structure and identifies principles of studying the structure of modern words, units of word formation systems and their interaction. This book was designed as a teaching aid for graduate students in courses on word formation and modern Russian literary language. However it is not a textbook in the proper sense. In some areas it goes much further than traditional teaching programs. List of works by N.A. Ianko-Trinitskaia (1908-1987).