초급elementary level; beginning stage 초급반beginner's class 최고급the highest grade; top-level 특급special class; special rank; special grade 하급생junior student; underclassman 고급high quality; high grade 고급반class for advanced learners; the highest-level class 고급품high-end product 고급화enhancement 상급반upper grades; higher grades

교우friend 교우school friend; colleague 우정friendship 학우school friend; classmate 교우brethren 동우회club 문방사우The Four Friends of the Study 문우literary friend 우군ally; friendly forces 우방friendly nation; ally