城堡, 要塞
a fortress, typically on high ground, protecting or dominating a city
示例:• The ancient citadel stood proudly overlooking the city.古老的城堡傲然矗立，俯瞰着城市。• The invaders found it difficult to breach the strong citadel.入侵者发现很难攻破坚固的城堡。同义词:fortressfortcastlestrongholdbastion