劝阻 is a compound verb meaning 'to dissuade' or 'to discourage' someone from doing something, especially when the action is considered unwise, dangerous, or inappropriate. It combines 劝 (quàn), meaning 'to advise' or 'to urge', and 阻 (zǔ), meaning 'to obstruct' or 'to hinder'. Together, they convey the idea of using words—rather than force—to prevent an action. The emphasis is on gentle but firm verbal intervention, often motivated by concern for the other person's well-being or safety.

This verb is commonly used in interpersonal contexts: parents劝阻 children from risky behavior, friends劝阻 each other from impulsive decisions, or authorities劝阻 citizens from violating rules. It implies a relationship of care or responsibility, and the劝阻 usually happens before the action occurs. Unlike stronger verbs like 禁止 (to prohibit) or 阻止 (to stop physically), 劝阻 focuses on persuasion and moral appeal, not authority or coercion.