The study compares cognitive lexemes in German and Bulgarian, united in lexical-semantic fields based on integral semantic features. The lexical field is a paradigmatic structure composed of lexemes, the meaning of which forms a common significative core, and which are opposed in view of minimal differential features of meaning. The aim of the study is to compare elements of lexical systems in distantly related languages through the method of contrastive analysis, as these elements belong to different parts of speech, have different morphological and syntactic characteristics, but are united by a common semantic feature: intuitiveness. The paper focuses on lexical semantics and in particular on the discovery of lexical-semantic paradigm, which also presents synonymous relations as systemic relations in vocabulary. Expressing co-referentiality, synonyms in the work are characterized by common cognitive but different pragmatic meanings.

The work is an attempt to consider the concept of “cooperation” in cognitive-linguistic terms, taking as a syntagmatic basis “thinking”, which contains the motivating feature of the primary basis: the cognitive verb denken [think]. The term “semantic function” is one of the main terms in the work: this function acts as a stimulus for semantic transformation and the formation of a new semantic quality. The aim of the research is to analyze different semantic transformations in: 1. Formation of a derivative prefixed verb mitdenken. 2. Formation of the reflexive verbs sich einigen and sich sammeln. 3. Formation of the construction “adverb and cognitive verb”: miteinanderdenken/ zusammendenken / gemeinsamdenken. 4. Formation of the construction “preposition, pronoun and cognitive verb”: mit anderen erarbeiten. Through the method of componential analysis, the work presents lexemes, morphemes and functional words referring to the same semantic field.