This is the 4553rd most frequent Korean word.
對
The Korean word "對" (대) means "opposite" or "against."
Here, '대해' is derived from '對(대)', meaning 'towards' or 'about'.
그는 부모님에 대해 항상 감사하는 마음을 가지고 있습니다.
He always holds a feeling of gratitude towards his parents.
In this context, '대한' pertains to 'regarding' or 'about,' derived from '對(대)'.
그 작가는 자연에 대한 깊은 이해를 가지고 있습니다.
The writer has a deep understanding of nature.
'대해' here again means 'regarding' or 'about,' showing its application in formal discussions.