This is the 4086th most frequent Turkish word.
hava
"Air" or "weather."
In this sentence, 'hava' is used to mean 'weather'.
Bugün hava çok güzel.
Today, the weather is very nice.
Here, 'hava' means 'air' in the sense of breathable atmosphere.
Odada biraz hava var mı?
Is there some air in the room?
In this context, 'hava' conveys the sense of 'mood' or 'atmosphere'.