This is the 3594th most frequent Korean word.
방해한
"방해한" means "disturbed" or "interfered."
방해한 here is used as a past participle modifying "행위(behavior)" to describe something that caused disruption.
그가 중요한 회의를 방해한 것은 실망스러웠다.
It was disappointing that he disrupted the important meeting.
방해한 functions as a verb in the past tense referring to the act of interruption of time.
나는 친구의 시간을 방해한 것이 아닌지 걱정했다.
I worried that I might have interrupted my friend's time.
방해한 is used in an indirect manner to refer to the act of invading or disrupting personal space.