Suvashun, the novel by Simin Daneshvar, is one of the most significant narrative works of contemporary Persian literature. In addition to representing a critical historical period, it contains complex linguistic and ideological layers. Drawing on Lesley Jeffries’ framework of Critical Stylistics, with particular emphasis on the component of opposition and synonymy, this study seeks to demonstrate how meaning and ideology in the novel are constructed not merely through content, but through systematic linguistic choices. The primary aim of the research is to elucidate the role of oppositions and synonymy in organizing the fictional world, shaping characterization, and directing the reader’s evaluative judgments.The research adopts a descriptive–analytical method and is based on qualitative textual analysis. Data are extracted from the text of Suvashun and analyzed according to Jeffries’ critical stylistic framework, especially the mechanisms of opposition and synonymy. This approach focuses on the micro-level of language and on semantic relations among words, phrases, and narrative actions in order to reveal how meaning is produced and how ideology is naturalized within the text.The findings indicate that Suvashun is fundamentally structured around semantic binary oppositions. Oppositions such as self/other, resistance/compromise, awareness/passivity, and tradition/modernity recur throughout the novel and are reinforced through networks of synonymy. By creating semantic equivalence among characters, actions, and concepts, synonymy consolidates each pole of these oppositions and intensifies the evaluative stance of the text.