The role of morphonological elements in the abstract nouns word formation with the suffix -ost’ (-est’)
The issue of morphonology status and units of its description remains relevant in modern linguistics. The purpose of study is to describe the morphonological rules for choosing suffix -ost’ (-est’), to investigate the hierarchies of morphonological units that determine the synthesis of the sound structure of derivatives under study, consisting of a set of stress morphonemes, phonemes alternation and allomorphs alternation. We mainly use the descriptive method, which includes such techniques as observation, comparison, juxtaposition, generalization, interpretation. Based on the description, we conclude that word formation of considered class of words is distinguished by fusion, and not agglutination. The choice of an allomorph depends on morphological characteristics of generator, and allomorph determines the stress and the type of derivative's alternant, that is, the morphological unit includes phonemes alternation, stress alternation and allomorphs alternation of the suffix, which are 3 morphonological units. The results of study, in particular, the significance of suffix in describing the theoretical foundations for describing the morphonological phenomena of Russian language, as well as the model of morphonological description of Russian word formation, make a certain contribution to the development of morphonology as an independent science. The practical significance lies in the fact that the conclusions and materials of study can be used in the compilation of special morphonological dictionaries.