This is the 19207th most frequent Korean word.
안보시설을
"Security facilities."
In this context, '안보시설을' refers to significant buildings or infrastructures related to security.
그 지역에는 중요한 안보시설을 많이 볼 수 있습니다.
In that area, many important security facilities can be seen.
Here, '안보시설을' is describing the security facilities that are to be safeguarded.
정부는 새로운 법안으로 안보시설을 보호하려고 합니다.
The government is trying to protect security facilities with the new legislation.
In this context, '안보시설을' pertains to sites designated for security measures and their protocols.