독서reading 구두점punctuation 독서실study room 독자reader 독후감book report 탐독devouring; reading avidly 통독reading through; reading from cover to cover 판독decipherment; reading 판독기reader 필독서must-read; required reading

교과서textbook 도서관library 독서reading 서류document; papers 서점bookstore 엽서postcard 추천서letter of recommendation; letter of reference 가입서registration documents 계산서check; bill 계약서contract; written agreement

삼three 삼십thirty 삼월March 삼촌uncle; paternal uncle 삼각triangle; being triangular 삼수third try; three attempts 삼총사trio; threesome; triumvirate; three musketeers 수삼a couple of 외삼촌one's maternal uncle 초가삼간chogasamgan

몽매ignorance 무지몽매being unknowing and ignorant 삼매경being lost; being absorbed; being immersed