This is the 2879th most frequent Russian word.
бокса
"Бокса" is the genitive singular or nominative plural form of "бокс," which means "boxing" or "box" depending on the context.
Here, 'бокса' refers to 'boxing' as a sport.
Я купил новую пару бокса для занятий спортом.
I bought a new pair of boxing gloves for exercising.
In this sentence, 'бокса' corresponds to 'boxes' in plural form describing transportation items.
На улице стоит большой грузовик для перевозки бокса.
A large truck for transporting the boxes is parked on the street.
Here, 'боксу' (form of 'бокс') directly refers to the sport of boxing, used here in the context of watching a match.