He was always faithful to his friends.

He is known for his faithfulness to his work.

He pioneered a new realm.

He is good at speaking Chinese.

He is my faithful servant, always carrying out my orders.

The police safely released the hostage.

The doctor gave me an injection.

The doctor injected medicine into my arm.

My dream is to travel the seven seas.

That detection device is very useful for finding landmines.