This is the 9051st most frequent Korean word.
개최해선
"개최해선" refers to "if/when hosting or holding (an event)."
In this sentence, "개최해선" is used in a prohibitive sense, indicating that hosting or holding an event is not advisable or should not be done.
그 회의는 세계 경제 포럼을 개최해선 안 되는 이유를 설명합니다.
The meeting explains the reasons why the World Economic Forum should not be held.
Here, "개최해선" is used conditionally to express a causal relationship that holding the event might lead to particular consequences.
학교 운동회 개최해선 학생들의 참여가 줄어들 가능성이 있다.
Hosting the school sports day may result in decreased student participation.
In this example, "개최해선" is emphasizing conditions under which hosting the event is inappropriate or unacceptable.