kyu
/kjuː/(亦作kyu grade)
noun
1- a numbered grade of the less advanced level of proficiency in judo, karate, and other martial arts（柔道、空手道等武术项目的）段, 级。比较
DAN1 .
1.1
- a person who has achieved such a grade（柔道、空手道等的）获段级的选手。
词源
from Japanese kyū 'class'.