해자
a deep, wide ditch surrounding a castle, fort, or town, typically filled with water and intended as a defense against attack
:
• The ancient castle was protected by a wide moat.
고대 성은 넓은 해자로 보호되었다.
• They had to cross the moat to enter the fortress.
그들은 요새에 들어가기 위해 해자를 건너야 했다.