Which phrase best describes 'karate'?

The phrase that best describes 'karate' is unarmed self-defense. Karate is primarily a martial art that emphasizes striking techniques such as punches, kicks, and knee strikes, all performed without the use of weapons. It focuses on developing physical skills, techniques, and movement to defend oneself effectively without relying on any implements. This aspect of karate is foundational, as the discipline teaches practitioners how to respond to physical threats through various forms of blocking, striking, and controlling an opponent's movements.

Although karate can also have competitive elements and be part of sporting events, its core is rooted in the principle of self-defense. This is a key reason why the phrase refers to karate as unarmed self-defense, as it encapsulates the essence of what practitioners learn and the primary purpose behind their training. The focus on mental strategy is certainly a component of martial arts in general, as practitioners develop concentration and discipline, but it does not define karate as thoroughly as the self-defense aspect does.