错误 (cuòwù) is a compound noun meaning 'mistake' or 'error'. It combines two characters with closely related meanings: 错 (cuò), which means 'wrong' or 'incorrect', and 误 (wù), which means 'to misunderstand' or 'to err'. Together, they emphasize a factual or procedural deviation from correctness — whether in speech, writing, calculation, judgment, or action. Unlike more casual terms like 失误 (shīwù) or 口误 (kǒuwù), 错误 carries a neutral-to-formal tone and is widely used in academic, technical, and everyday contexts.

This word often appears in feedback, corrections, or self-reflection — for example, when pointing out a typo in a text, an incorrect answer on a test, or a flawed assumption in reasoning. It can function as the subject, object, or complement in a sentence, and frequently pairs with verbs like 犯 (fàn, 'to commit'), 发现 (fāxiàn, 'to discover'), or 改正 (gǎizhèng, 'to correct'). While it’s rarely used as a verb itself, it’s essential for clear, precise communication about accuracy and accountability.