This is the 305th most frequent Korean word.
충분히
"Sufficiently" or "enough."
충분히 emphasizes the preparedness to suggest it was adequate or thorough.
그는 충분히 준비하고 시험을 보았습니다.
He prepared sufficiently and then took the exam.
충분히 is used to describe the extent of discussion, indicating it was exhaustive or satisfactory.
이건 충분히 논의된 상황이니 계속 진행합시다.
This is a situation that has been sufficiently discussed, so let's proceed.
충분히 is used here to describe the extent of an action, specifically sleeping adequately.