威胁 (wēi xié) is a compound word meaning 'threat' as a noun or 'to threaten' as a verb. The first character 威 (wēi) means 'power', 'authority', or 'menace', often implying an imposing presence; the second character 胁 (xié) means 'to coerce', 'to force', or 'to intimidate', historically related to pressing against someone’s ribs — suggesting physical or psychological pressure. Together, they convey the idea of using power or fear to compel action or submission.

This word appears frequently in formal, legal, political, and interpersonal contexts — such as security warnings, diplomatic statements, or descriptions of bullying or coercion. It carries a strong, often negative connotation and implies seriousness and intent to harm or control. Unlike milder terms like 担心 (to worry) or 提醒 (to remind), 威胁 always involves an element of implied or explicit danger, making it unsuitable for casual or humorous use without clear context.