boxing
Boxen is the German term for boxing, a combat sport in which two people, usually wearing protective gloves, throw punches at each other for a predetermined amount of time in a boxing ring. The result is decided when an opponent is deemed incapable to continue by a referee, is disqualified for breaking a rule, resigns by throwing in a towel, or is pronounced the winner or loser based on the judges' scorecards at the end of the contest.
I have two boxes in my room.
In this sentence, 'Boxen' is used as a noun to refer to actual physical boxes. It indicates that there are two of them in the speaker's room.
The speakers are very loud.
In this context, 'Boxen' refers to audio speakers, not physical boxes. The sentence gives information about the state of the speakers – they are loud.
The boxes do not fit in the cupboard.
Here, 'Boxen' refers again to physical boxes. The sentence provides information about the size of the boxes in relation to the cupboard – they are too big to fit inside.