중학교middle school 중학생middle-schooler 중간middle; midway 중심center 식중독food poisoning 중(no equivalent expression) 중간middle 중간시험midterm 중심center 중앙middle

초순the first ten days of a month 칠순the seventieth year since one's birth 팔순eightieth year since one's birth 하순end of month; latter part of month 상순first ten days of a month; beginning of a month 육순sixtieth year since one's birth