戒备森严

Explanation: Prepare for a very tight guard. 　　Usage: The main predicate; as predicate, object, attribute; described Scarred 　　Source: "Mandarin Shinzo": "test and learn on, carry on complete alert." 　　Examples: I remember that day was the sun in the sky, twenty thousand people sit on the floor a large playground, off-site ~. (Chen Ruoxi "Ren Xiulan") Thesaurus:  Heavy doors Click Hierarchical, Hierarchical heavy blow off