睿智 (ruì zhì) is an elegant, formal adjective meaning 'keen wisdom' or 'sagacious'—describing a person’s profound, insightful, and discerning intelligence. The character 睿 (ruì) conveys deep perception and clarity of mind, often associated with enlightened judgment; 智 (zhì) means 'wisdom' or 'intelligence', emphasizing rational understanding and sound reasoning. Together, they form a compound that goes beyond ordinary cleverness—it suggests mature, morally grounded insight, frequently attributed to elders, scholars, leaders, or historical figures.

This word is commonly used in written Chinese and formal speech, especially when praising someone’s thoughtful decisions or reflective character. It appears in literature, biographies, news editorials, and academic discourse—not in casual conversation. While it can modify nouns directly (e.g., 睿智的见解 'sagacious insights'), it’s rarely used predicatively without additional context (e.g., *他很睿智* is grammatical but sounds literary and elevated, not colloquial).