Doing something diligently means doing it thoroughly and well. It’s the opposite of doing it lazily or shoddily.
If you are tireless, persevering, and do things with great care, then you do things diligently. This is an adverb that goes with hard and careful work. If you have a test coming up, the more diligently you review your materials, the better your grade will be. Workers who do their job diligently tend to get promoted. Some dogs diligently pursue squirrels in the park. When someone uses this word about something you’ve done, it’s a huge compliment.
with diligence; in a diligent manner“we may
diligently observe the Lord’s supper on the first day of the week, diligently preach the gospel, or minister to the saint”