This is the 9803rd most frequent Japanese word.
補修
"補修" means "repair" or "maintenance."
Here, '補修' is used to describe the action of fixing an item for reuse, specifically shoes.
靴を補修してまた使えるようにしました。
I repaired the shoes so that they could be used again.
In this occurrence, '補修' implies supplementary or remedial instruction to overcome gaps in knowledge or skills.
補修クラスを受けることで数学の理解が深まりました。
Attending the remedial class deepened my understanding of mathematics.
In this sentence, '補修' refers to the process of restoring or repairing the structure of the old bridge.