상하up and down 하수sewage 하숙비payment for board and lodgings 영하temperature below zero 지하basement 지하도underground tunnel 지하철subway 지하철역subway station 하bottom; lowest 하강fall; descent

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

학생student 대학생university student 중학생middle-schooler 여학생female student 남학생male student 초등학생elementary school student; primary school student 생일birthday 출생birth 인생human life 학교생활school life; student life