The man worked diligently on the project.

Meaning: This means the man was putting in a lot of effort and attention to the project. It's like saying, The man was very dedicated to the project.

Choice of Words: Worked is a verb that describes the act of doing something in order to achieve a goal. Diligently is an adverb that describes how something is done with great care and effort. Together, they show that the man is putting in a lot of effort and attention to the project.

Alternative Expressions

Related Expressions