fastness
🇬🇧/ˈfɑːstnəs/ 🇺🇸/ˈfæstnəs/
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A fastness is a place, such as a castle, which is considered safe because it is difficult to reach or easy to defend against attack. 要塞; 堡垒
noun [专属名词] 牢固；不褪色；要塞；巩固；堡垒；迅速
They could have withdrawn into the mountain fastness of Eryri. 他们本来可以撤回到艾瑞的山区要塞里。
