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ventilation (noun)
The movement of fresh air into a room or building to replace old or dirty air. It is important for keeping a home healthy and comfortable.
"Please open the window for some ventilation."
Think of a 'Vent' in a 'Station'. A 'Vent' in the 'Station' provides 'Vent-i-la-tion'.
Using 'ventilator' to mean 'fan'. → I turned on the fan.
Saying 'I need some ventilations'. → I need some ventilation.
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