'airwash' originates from the combination of 'air' and 'wash', where 'air' refers to the invisible gaseous substance surrounding the earth, and 'wash' means to clean with water or another liquid.

'airwash' is a modern term that combines 'air' and 'wash' to describe a cleaning process using air.

Initially, it meant 'to clean using air', and this meaning has largely remained the same in modern usage.