Preposition: of

• mystery: There's an air of mystery surrounding the sacred place where men, quite simply, are NOT ALLOWED.

Converse of object

• compress: It is required to compress air from P 1 to P 4.

• breathe: It is a basic human right to breathe fresh air.

• fill: The huge machine slowly rose and dust and debris filled the air.

• punch: Looking over to the DJ booth this is confirmed as ET punches the air and dances manically to the tunes he selects.

• sniff: You sniff the air You smile weakly - Jolen unwraps the bowl, peering at it still, blowing harshly to remove the dust.

• blow: Fan will be attached to this to blow fresh air to the bottom.

Adjective modifier

• fresh: He had not played in fresh air for 11 years.

• thin: We have all seen over the years aid pouring into Africa, only to vanish into thin air.

• hot: It was heated by hot air under the raised floors.

• warm: The trapped air pockets of warm air provide insulation to reduce heat loss from your pet's body.

• clean: The filter then becomes an endless source of calm, clean air.

• cold: A blower then pushes the cold air out into the room.

Modifies a noun

• conditioning: What kind of an air conditioning unit do you require?

• pollution: In addition, an index of air pollution for the Brussels region is available.

• raid: ARP wardens were enlisted to help protect the general public during an air raid, for example, guiding people to the shelters.

• quality: Chitty, Chitty, Bang, Bang is helping to improve air quality with a cleaner, quieter engine.

• traffic: In most EU states, the control of military aircraft is integrated to some degree with civilian air traffic control.

• travel: The National Air Traffic Control System very recently crashed throwing air travel in to chaos.

Noun used with modifier

• combustion: The pressure switch monitors flow and shuts down the heater in the event of flue or combustion air blockage.