key [i k7: ]     (순위: 928 - 중2 수준)   뜻  열쇠,비결 Mean  A notched and grooved, usually metal implement that is turned to open or close a lock. 예문 1. a key color (기본색) 2. the key to trainning a horse (말을 훈련시키는 방법) 3. in a minor key (침울한 어조로) 4. all in the same key (모두 같은 목소리로, 단조롭게) 5. the key to happiness (행복을 얻는 비결)