The interdisciplinary notion picture of the world makes research works devoted to this area of studies challenging from the point of view of finding interconnections between linguistic and extra-linguistic factors in the process of structuring categories of words, including those functioning in terminological systems and subsystems. Legal pictures of the world are specific cultural phenomena that may differ in various countries due to the nationally specific features of law and legal culture development. One of the most complicated problems of representing (...) specific knowledge through linguistic, terminological, signifiers is the problem of linguistic categorization of concepts. The article considers the problem of forming legal categories based on word-building suffixes from the point of view of the development of the legal language ‘picture of the world’ [reflection of the world] closely associated with its conceptual picture. The conclusion is drawn that commonly used derivational suffixes transform their meanings in accordance with the legal taxonomies, forming the conceptual legal picture of the world. The results of theoretical studies in terminological conceptualization may be used in teaching legal English vocabulary in the form of systematic presentation of term-building patterns expressing certain conceptual categories. (shrink)