押运 (yā yùn) is a compound verb meaning 'to escort'—specifically referring to the secure, supervised transportation of valuable or sensitive items such as cash, goods, prisoners, or hazardous materials. The first character 押 (yā) means 'to detain', 'to pledge', or 'to supervise closely', implying control and oversight; the second character 运 (yùn) means 'to transport' or 'to carry'. Together, they emphasize both security and movement—highlighting that the escort is not passive but involves active monitoring and protection throughout transit.

This term is commonly used in formal, institutional, or professional contexts: banks hire armed guards for cash押运, logistics companies use it for high-value cargo, and law enforcement applies it when moving detainees between facilities. It carries connotations of authority, responsibility, and risk management—not used for casual or personal deliveries. While 押运 can refer to people (e.g., prisoners), its core focus remains on safeguarding the escorted object or person during transport.