负债 (fù zhài) literally combines 负 (fù), meaning 'to bear' or 'to carry', and 债 (zhài), meaning 'debt' or 'loan'. Together, they form a compound that means 'to be in debt' — indicating a financial obligation where one owes money to another person, institution, or organization. It functions both as a noun (e.g., 'a debt burden') and as a verb (e.g., 'to incur debt').

This term is commonly used in personal finance, business reporting, and everyday discussions about money management. While it’s neutral in tone, it often carries a slightly negative connotation because being in debt implies financial pressure or risk. It appears frequently in news reports, balance sheets, and conversations about loans, credit cards, or mortgages. Unlike colloquial terms like 欠钱 (qiàn qián, 'to owe money'), 负债 is more formal and precise, especially when referring to quantifiable, documented obligations.