The term BOXING RING BOUNDARIES can be broken down into five solutions: ROPES (5 letters), ARENA (5 letters), REF (3 letters), SPAR (4 letters), and ALI (3 letters). Ropes are typically used to mark the perimeter of a boxing ring, while an ARENA is a large, enclosed area where boxing matches take place. A referee is the person who oversees the match and enforces the rules, while sparring is a type of practice boxing match. Finally, Muhammad Ali was a legendary boxer who is widely considered to be one of the greatest athletes of all time.