Hapkido or Hap Ki Do is a dynamic and somewhat eclectic Korean martial art. In the Korean language, Hap means "harmony", "coordinated", or "joining"; Ki describes internal energy, spirit, strength, or power; and Do means "way" or "art". Thus, Hapkido translates literally as "joining-energy-way", but it is most often rendered as "the way of coordinating energy" or "the art of coordinated power."
A historical link to Daito-ryu Aiki-Jujutsu is generally acknowledged, though the exact nature of which is clouded by the animosity between two peoples (Koreans and Japanese) and the confusion following the end of the Second World War.