This is the 927th most frequent Spanish word.
arena
Sand.
In this sentence, the word 'arena' refers to 'sand', as it is used to describe the fine granules commonly found at beaches.
La arena de la playa estaba muy caliente.
The sand of the beach was very hot.
Here, 'arena' is used to mean an enclosed performance space, such as where a circus takes place.
La arena del circo estaba llena de luces y colores.
The arena of the circus was full of lights and colors.
In this example, 'arena' refers to a specific venue, a central space, where events like fights occur, commonly associated with historical or Roman settings.