air pump 
noun
A device for pumping air into or out of an enclosed space.An air pump circulates a continuous flow of air through the device, replacing any air that is lost through the surface's pores....
- I'm not going to bore you with the details of what we did but I will say that I lugged the air pump and extension cord up from the basement.
- A car is parked under our window and has a air pump attached to it which is left to blow up the tyres while my neighbour and his mechanic friends work on another car.
- Michaelis constant
- Michaelis–Menten
- michaelite
- Michaelmas
- Michaelmas daisy
- Michaelmas day
- Michaelmas eve
- Michaelmas head court
- Michaelmas summer
- Michaelmas term
- michaelsonite
- Michael, St
- michelada
- Michelangelesque
- Michelangelo
- Michelin
- Michelin man
- Michelin star
- Michelin-starred
- Michelin tire man
- Michelin tyre man
- Michelozzo
- Michelsberg
- Michelson, Albert Abraham
- Michelson experiment