Cách sử dụng
The word 'citadel' refers to a fortress or a strong and secure building that offers protection from enemies or dangers. It is commonly used to describe a military stronghold or a fortified city. For example, a citadel may be a fortified castle built atop a hill, with thick walls and defenses that can withstand attacks. In everyday language, the word citadel may also be used more figuratively to describe a secure position or a place of refuge for a person or group.