This is the 642nd most frequent Swedish word.
havet
The sea.
Here, 'havet' is the subject of the sentence, representing the sea in a general sense.
Havet är stort och blått.
The sea is vast and blue.
In this sentence, 'havet' is used to specify a location by the sea.
Vi promenerade längs havet igår kväll.
We walked along the sea last evening.
Here, 'havet' refers to the ocean as the source of the sound being described.