おぎなoginau
1.

To add to something that is lacking in order to achieve a sufficient state or level.

2.

To make up for a loss or mistake, providing restitution for past shortcomings.

3.

To repair or mend areas that are torn or worn out, restoring them to a functional condition.

Example:

あなたの食事にはビタミンを補うほうがよい。