实施 (shí shī) is a formal verb meaning 'to implement' or 'to carry out'—especially plans, policies, laws, measures, or procedures. It combines 实 (shí), meaning 'real', 'actual', or 'concrete', and 施 (shī), meaning 'to apply', 'to exert', or 'to put into effect'. Together, they convey the idea of making something real through deliberate action—not just planning or discussing it, but executing it concretely. The word implies intentionality, structure, and often official or organizational authority.

实施 is commonly used in administrative, legal, medical, educational, and policy contexts—for example, implementing new regulations, a public health campaign, or a curriculum reform. It rarely appears in casual speech; instead, you’ll hear it in news reports, government documents, workplace meetings, or academic writing. Unlike more general verbs like 做 (zuò, 'to do') or 执行 (zhí xíng, 'to execute'), 实施 emphasizes the transition from theory or proposal to tangible, systematic action.