Aromatic compounds are a group of compounds with specific chemical properties.

He left the room silently.

His silence makes it difficult to understand what he is thinking.

He used a string to hang a picture on the wall of the room.

His chest was constricted with fear.

He is an expert in aerobiology, engaged in the study of microorganisms in the atmosphere.

There is a new air purifier in my room.

He went to try out his new air gun.

He is reading a book about the Apocalypse.

The bandits attacked the village.