This paper examines the contradictory “Adj. + 的 + N” construction in Modern Chinese from both diachronic and synchronic perspectives. It contends that this structure is not simply a form of rhetorical semantic deviation, but rather represents the compression and grammatical encoding of inherent conflicts within human multimodal cognitive experience. The diachronic analysis reveals that the construction has evolved from philosophical expressions and literary rhetorical forms into a productive grammatical pattern, demonstrating typical grammaticalization features such as semantic weakening and structural conventionalization. From a synchronic and multimodal cognitive perspective, the study proposes a generative mechanism of “cross-modal conflict and suppressive integration.” Furthermore, it constructs a continuum model comprising perception, emotion, cognition, intention, and social evaluation/norms to explain the differentiation and interconnection among various types of contradictory constructions. The research illustrates how the Chinese language systematically encodes complex and contradictory experiences through this grammatical form, thereby providing a fresh lens for understanding the interplay between language, cognition, and culture.