Coenzyme is a substance necessary to assist chemical reactions in the body.

His high-pitched voice echoed throughout the room.

He raised his voice in anger.

He always lowers his voice when he talks about secrets.

He is being criticized as a loudmouth.

He is called a 'kid's room uncle', and is alienated from society.

The Kurogakejigumo, as its name suggests, is a spider with a black body color.

The black house spider has made a web in the corner of the house.

The black house spider has made a web in the corner of the house.

My mother wipes the floor with a rag every day to keep the house clean.