기회chance; opportunity 비행기plane; airplane 사진기camera 선풍기fan 세탁기washing machine 자동판매기vending machine 자판기vending machine 전화기telephone 청소기vacuum cleaner 검사기testing machine

비밀secret; covertness 비밀문서secret document; confidential document 비밀번호password; PIN number 친밀closeness; intimacy 친밀감sense of closeness; intimacy 고밀도high density 과밀congestion 기밀top secret 긴밀감intimacy 밀고informing against; squealing; ratting on

문구stationery; writing supplies 문어octopus 문화culture 안내문letter of notice; notice; introduction 주문order 한문classical Chinese 감상문review 감탄문exclamatory sentence 광고문advertisement 기사문descriptive writing

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