This is the 3143rd most frequent Korean word.
개인적인
"Personal" or "private."
Here, '개인적인' is used to describe 'opinion' as being subjective or unique to the individual speaker.
이것은 제 개인적인 의견입니다.
This is my personal opinion.
In this sentence, '개인적인' is used to qualify 'reasons' as being specific to the individual in question.
그의 행동이 개인적인 이유에서 비롯된 것 같아요.
His actions seem to have originated from personal reasons.
Here, '개인적인' modifies 'conversation,' indicating that the conversation pertains to private matters relevant to an individual.