This is the 3745th most frequent Korean word.
성실히
Diligently; sincerely; faithfully.
Here, '성실히' (sincerely, diligently) is used as an adverb to describe the manner in which the duties are performed.
그는 매일 업무를 성실히 수행합니다.
He diligently performs his duties every day.
In this sentence, '성실히' is employed to describe the level of commitment expected from students toward completing their tasks.
학생들은 과제를 성실히 완수해야 합니다.
Students must complete their assignments diligently.
The word '성실히' is used here to express the importance of sincerity and diligence as qualities for achieving success.