资本 (zī běn) literally combines 资 (zī), meaning 'resource' or 'funds', and 本 (běn), meaning 'origin', 'foundation', or 'principal' — together conveying the idea of foundational resources that generate value. In economics, it refers to financial assets used to produce goods or services, such as money, machinery, or property. It can also extend metaphorically to non-financial forms of advantage, like social capital (e.g., influential connections) or human capital (e.g., skills and education).

The term appears frequently in business, policy, and everyday discussions about investment, entrepreneurship, and inequality. Unlike colloquial English 'capital', Chinese 资本 is almost always neutral or technical in register — it doesn’t inherently carry positive or negative connotations, though context (e.g., '资本家' vs. '社会资本') may shift its tone. It’s rarely used for 'capital letters' (that’s 大写字母) or 'capital city' (首都), which are entirely different concepts.