경고한

In a sentence

• 그는 경고한 자세로 모든 상황을 살폈다.

  He observed every situation with a cautious demeanor.

  Here, "경고한" is used to describe a cautious or attentive attitude, showing alertness.

• 선생님은 학생들에게 늦지 말라고 경고한 적이 있다.

  The teacher once warned the students not to be late.

  In this case, "경고한" relates to giving a warning or an admonition.

• 지난번 실수에 대해 경고한 이후, 그는 일을 더 신중하게 처리한다.

  After being warned about the previous mistake, he handles work more carefully.

  Here, "경고한" conveys the meaning of having received a prior warning or caution.