This paper discusses the active trends in the Modern Ukrainian vocabulary and grammar development, i.e., formal-semantic stratification and functional-stylistic differentiation of their units. The authors reinterpret stratification as aspectualization structuring a certain concept active in a speaker’s mind to meet their new cognitive needs. It results in new language idioms, that is, grouping of language units of different levels of verbalization of the same concept, namely stratum. Differentiation is found in the creation of nominations of the same level of concept verbalization but with different pragmatic and stylistic potential designed for different language registers and communicative situations. A number of new and modified language idioms signals of an increase in cognitive and communicative power of language. The paper pays particular attention to the role of usual and occasional word-formation in the stratification of verbalizers of certain concepts and their functional and stylistic differentiation. The application of structural, functional, and pragmatic criteria of occasionality made it possible to identify the cause of the formation of transients between usual (normative) and occasional (non-normative) units. Occasionalism created according to active word-forming models is a resource for strengthening the cognitive and communicative power of language, stratification, and differentiation of its lexicon with the help of word-formation methods and means. The dynamics in the system of Modern Ukrainian verbs is marked by the formation of new functional and stylistic idioms. Intensified globalization processes contribute to the elimination of some meanings of a verb and the expansion of the sphere of functioning of other meanings of the verb. Keywords: stratification, differentiation, cognitive power of language, communicative power of language, language idiom