恰巧 is an adverb meaning 'coincidentally' or 'just so happens', used to describe an unexpected but convenient or timely occurrence. The character 恰 (qià) means 'just right' or 'exactly', while 巧 (qiǎo) means 'clever', 'skillful', or 'fortuitous' — together they convey the sense of a happy, unplanned alignment of circumstances. It emphasizes that something occurred at precisely the right moment by chance, not by design.

This word is common in spoken and written Chinese, especially when narrating everyday situations where timing works out perfectly — like meeting someone unexpectedly, arriving just as something begins, or finding exactly what you need without searching. It carries a neutral-to-positive tone and often implies mild surprise or satisfaction. Unlike more formal synonyms, 恰巧 feels natural in casual conversation and storytelling, and it usually appears before the verb or at the beginning of a clause.