This is the 15980th most frequent Korean word.
부진했던
"부진했던" means "was sluggish" or "was underperforming."
In this sentence, '부진했던' is used to describe the grades that were poor or underperformed in a certain context (the previous exam).
그는 지난 시험에서 부진했던 성적을 만회하기 위해 열심히 공부했다.
He studied hard to make up for his poor grades in the previous exam.
Here, '부진했던' is referring to the performance level in games during last season that was not satisfactory.
우리 팀은 지난 시즌에 부진했던 경기력을 극복하여 이번 시즌에 더 좋은 결과를 얻었다.
Our team overcame the poor performance from last season and achieved better results this season.
'부진했던' in this case is describing a state of health that had been lacking or not ideal in recent times.