协助 means 'to assist' or 'to help' — a formal, cooperative action where one person or group supports another to achieve a shared goal. The character 协 (xié) conveys 'harmony', 'coordination', or 'joint effort', while 助 (zhù) means 'to help' or 'to aid'. Together, 协助 emphasizes mutual support and teamwork rather than one-sided help; it implies active participation, often in professional, academic, or organizational contexts.

This verb is commonly used in written Chinese and formal spoken settings — such as workplace emails, official documents, news reports, or project descriptions. It typically takes a direct object (e.g., 协助老师, 协助调查) and is rarely used in casual daily conversation, where 帮助 or 帮 is preferred. While 协助 can appear in compound nouns (e.g., 协助者 'assistant'), its primary function is verbal, and it is almost never used as a standalone noun.