Here's my take, based on, judging by (meaning depends on the word it is paired with)
Explanation
Kimchi Reader
Expresses that the clause that comes after is something that the speaker has heard, seen, or wishes or believes. Commonly added to verbs like "장담하다," "짐작하다," "보다," "바라다."
Examples
맹세코 말하<span class='focus'>건대</span> 나는 하지 않았어.
I swear to you, I didn't do it.
장담하<span class='focus'>건대</span> 그 친구가 분명히 시험을 잘 볼 것이다.
I can assure you that he/she will do well on the test.
지금까지 받은 보고를 종합적으로 판단해 보<span class='focus'>건대</span> 부검 할 필요는 없을 것 같습니다.
Based on a comprehensive look at the reports I've received up until now, there should be no need to perform an autopsy.