경계

guard; lookout; watch

Explanation

〔警戒〕

1. guard; lookout; watch
An act of looking around methodically and being careful in order to prevent an unexpected accident or danger.

2. caution
An act of taking precaution not to do something wrong, act improperly, or think improper thoughts.

Examples
경찰의 경계
군인의 경계
삼엄한 경계

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