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

He went to try out his new air gun.

There is a new air purifier in my room.

He is reading a book about the Apocalypse.

The bandits attacked the village.

He is not my blood relation.

He was born blind.

He is a blind pianist.

He can't read the room, so he caused trouble for everyone at the party.

He grabbed the cat by the scruff of the neck and lifted it up.