This text examines the ontological and historical development of the concepts of subject and subjectivity. The author begins by analyzing the Latin etymology of the word "subject," originally denoting that which is thrown underneath, and traces its semantic shift influenced by Christian and Hebrew thought. It critically reassesses the traditional view of René Descartes as the founder of European subjectivism, arguing that Descartes' conception remained rooted in an objectifying tradition where the subject is treated as a "thing" (res cogitans). The author identifies a genuine turning point in Leibniz's monadology and, more significantly, in Kierkegaard's existential concept of the subject as a non-object. The text emphasizes the necessity of distinguishing between subjectivity and "subjectness" (subjektnost), a distinction that remains terminologically unstable in contemporary literature. Finally, the author calls for the development of a new, persuasive conceptual framework that reflects the modern understanding of existence as "ex-sistence" and addresses the persistent terminological ambiguity within philosophical discourse.