This is the 344th most frequent Spanish word.
aire
"Air" or "atmosphere."
In this context, 'aire' refers to the gaseous substance that surrounds the Earth, emphasizing its quality.
El aire fresco de la montaña es agradable.
The fresh mountain air is pleasant.
In this case, 'aire' again refers to the physical substance, specifically emphasizing its movement into a space.
Abre la ventana para que entre un poco de aire.
Open the window so that some air can come in.
Here, 'aire' signifies an intangible impression or characteristic that someone seems to possess.