This is the 4473rd most frequent Korean word.
활발한
Active; lively; energetic.
Here, '활발한' describes the characteristic of someone's personality, implying they are enthusiastic and energetic.
그는 매우 활발한 성격을 가지고 있다.
He has a very active personality.
In this sentence, '활발한' modifies '토론', indicating the discussions were engaging and dynamic.
활발한 토론이 교실에서 이루어졌다.
Active discussions took place in the classroom.
Here, '활발한' describes the nature of the business activities, suggesting they are thriving and vigorous.