This is the 6964th most frequent Russian word.
арены
"Арены" in English means "arenas."
The word 'арена' [arena] here refers to a literal amphitheater or stage where events take place.
Гладиаторы сражались на арене в Риме.
The gladiators fought in the arena in Rome.
In this sentence, 'арена' is used metaphorically to describe the sphere of political activity.
В политической арене часто происходят ожесточенные дебаты.
On the political arena, fierce debates often take place.
Here, 'арена' refers to a stadium or venue specifically for sports events.