‘冒充’ is a verb meaning 'to impersonate' or 'to pose as' someone or something one is not — typically with intent to deceive for personal gain, advantage, or avoidance of responsibility. The character 冒 (mào) originally means 'to rush out' or 'to risk', suggesting boldness or recklessness; 充 (chōng) means 'to fill' or 'to serve as', implying substitution or false representation. Together, they vividly convey the act of audaciously stepping into another’s role or identity without authorization.

This word is commonly used in contexts involving fraud, pretense, or unauthorized representation — such as pretending to be a doctor, using fake credentials, or masquerading as an official. It carries a clear negative connotation and often appears in news reports, legal warnings, or cautionary conversations. While it can be used literally (e.g., impersonating a person), it also extends metaphorically (e.g., claiming expertise one lacks). It is not used for harmless role-play or acting in performance.