谨慎 (jǐn shèn) is an adjective meaning 'cautious' or 'circumspect'—describing someone who acts carefully, thoughtfully, and with awareness of potential risks or consequences. Both characters carry related meanings: 谨 (jǐn) implies restraint, formality, and attentiveness, while 慎 (shèn) emphasizes vigilance, prudence, and avoiding rashness. Together, they form a compound that conveys deep, deliberate care—not just in physical actions but especially in speech, decisions, and judgment.

This word is commonly used in formal, professional, or reflective contexts: advising someone before making a commitment, describing responsible behavior in business or health matters, or characterizing a thoughtful person’s demeanor. It carries a positive, respectful connotation—suggesting wisdom and maturity rather than fear or hesitation. While it can modify nouns (e.g., 谨慎的态度), it most frequently functions as a predicate or adverbial modifier (e.g., 他做事很谨慎).