He is interested in sexual activity.

He is known for his faithfulness to his work.

He was always faithful to his friends.

He pioneered a new realm.

He is good at speaking Chinese.

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

A centralized political system is one in which all power is concentrated in the central government.

I can't forget the taste when I first ate borscht.

She used to be my wet nurse.

He gave me good advice.