fastness
🇺🇸
/ˈfæstnəs/
🇬🇧
/ˈfɑːstnəs/
a place that is hard to reach or easy to protect
The soldiers hid in the fastness of the forest to avoid being found by the enemy.
병사들은 적에게 발각되지 않도록 숲의 깊은 곳에 숨었습니다.