‘还债’ literally means ‘to return debt’ — ‘还’ (huán) here means ‘to repay’ or ‘to return’, and ‘债’ (zhài) means ‘debt’ or ‘loan’. Together, the compound verb expresses the act of settling a financial obligation, whether money borrowed from a person, bank, or institution. It emphasizes completion and responsibility, often implying relief or moral duty once fulfilled.

This term is commonly used in everyday conversations about personal finance, family support, business transactions, and even metaphorical contexts (e.g., repaying kindness). It carries a neutral-to-formal register and is rarely used in casual slang. Unlike ‘欠债’ (to owe debt), which describes the state of being indebted, ‘还债’ always refers to the active process or completion of repayment — it’s inherently action-oriented and goal-directed.