I'm tired from studying for a long time.

His meritorious service is very significant to us.

He started working immediately after graduating from university.

He graduated from university for employment.

He has contributed to the company for many years as an elderly worker.

There are several words used as 働詞 in this ancient document.

We started a collaboration for a new project.

We decided to collaborate on a new project.

He learned about the concept of synergism in theology class.

It is important for each person to fulfill their role.