'注意' (zhù yì) literally combines '注' (zhù), meaning 'to pour, to focus', and '意' (yì), meaning 'thought, intention'. Together, they form a verb meaning 'to pay attention' or 'to be mindful of something'. It implies directing one’s mental focus toward a specific person, object, action, or situation—often to avoid danger, make an observation, or follow instructions.

This word is commonly used in everyday speech and writing, especially in warnings ('注意安全' — 'Pay attention to safety'), classroom instructions ('请大家注意听讲' — 'Everyone, please pay attention to the lecture'), and signs ('注意台阶' — 'Watch your step'). It can appear at the beginning, middle, or end of a sentence, often followed by a noun (e.g., 注意时间), a clause (e.g., 注意他刚才说的话), or nothing at all when context is clear. While it functions as a verb, it does not take aspect particles like 了 or 过 in most standard usages.