가계약假契約 provisional contract 계기契機 opportunity; chance 계약契約 contract; agreement 계약금契約金 down payment; earnest; deposit 계약서契約書 contract; written agreement 계약자契約者 contractor; contracting party 친목계親睦契 private fund of friendship 계契 gye 계약제契約制 contract system 계약직契約職 contract worker 묵계默契 tacit agreement 재계약再契約 renewal of agreement; renewal of contract