振作 is a verb meaning 'to rally' or 'to pull oneself together'—especially after feeling discouraged, tired, or emotionally low. The character 振 (zhèn) means 'to shake, to stir up, to invigorate', suggesting energetic revival; 作 (zuò) here functions as part of a compound verb meaning 'to act, to rise up'. Together, they convey the idea of actively rousing one’s spirit or energy from a slump. It’s commonly used in supportive contexts—by others encouraging someone, or by oneself in self-motivation.

This word emphasizes conscious effort and inner resolve rather than passive recovery. It often appears with subjects like 我, 他, or 大家, and frequently follows modal verbs (e.g., 要, 应该, 得) or imperative structures. While it can describe physical reinvigoration, its core sense is psychological: regaining mental clarity, motivation, or emotional strength after hardship, illness, failure, or fatigue.