振兴 (zhèn xīng) is a formal, positive verb meaning 'to revitalize' or 'to rejuvenate' — especially in contexts of restoring strength, prosperity, or vitality to something that has declined. The first character 振 (zhèn) means 'to shake, stir up, or invigorate', often implying energetic action; the second character 兴 (xīng) means 'to rise, prosper, or flourish'. Together, they convey a sense of purposeful, collective effort to lift something from stagnation or decline into renewed vigor.

This word is commonly used in official, academic, or media discourse — especially when discussing national development, regional economies, traditional culture, or declining industries or communities. It carries an optimistic, aspirational tone and often appears in policy slogans (e.g., 'revitalize rural areas') or cultural preservation efforts. While it can apply to organizations or sectors, it’s rarely used for individuals — you wouldn’t say 'revitalize a person'; instead, use words like 恢复 (recover) or 振作 (rally).