judo
noun [ U ] uk/ˈdʒuː.dəʊ/ us/ˈdʒuː.doʊ/
柔道
a sport in which two people fight using their arms and legs and hands and feet, and try to throw each other to the ground
He's a black belt (= has the highest level of skill) in/at judo. 他是黑带级柔道高手。