I am interested in the history of the Middle Ages.

He should stop his selfish behavior.

Abstract nouns, unlike nouns that refer to concrete things, refer to concepts or states that do not have a specific shape or color.

His artwork is very abstract, making it difficult to understand.

He has a deep interest in abstract art.

The central nervous system is responsible for transmitting information and controlling the body.

We chose Kyoto as the center of our trip.

He plays a central role in this project.

My father is good at Shogi.

We hold a luncheon meeting once a month.