진상규명이 · 진상규명을
fact-finding, uncovering the truth
Example
유가족들은 사고의 진상규명을 요구하고 있어요.
The bereaved families are demanding that the truth about the accident be uncovered.
Word parts
진 true+상 aspect+규 investigate+명 clear
Literally 'investigating until the true picture is clear'.