A place for a guard is a POST, usually located at a GATE, BORDER, or LINE. The guard's job is to protect the area from unauthorized entry and to ensure that only authorized personnel are allowed access. The term 'POST' comes from the Latin word 'ponere, ' which means 'to set up.' The term 'SHIN' is derived from the Old English word 'scinan, ' which means 'to shine.' The term 'GATE' is derived from the Old English word 'gatu, ' which means 'DOOR.' The term 'BORDER' is derived from the Latin word 'borda, ' which means 'EDGE.' The term 'LINE' is derived from the Latin word 'LINEA, ' which means 'STRING.'