鍵

(1)something crucial for explaining; "the key to development is economic integration"

(2)説明するために重要な何か

(3)a slight indication

(4)わずかな暗示

(5)evidence that helps to solve a problem

(6)問題を解く助けになる証拠

(7)a hand tool that is used to hold or twist a nut or bolt

(8)ナットやボルトを支持したりねじったりする手工具

(9)metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated

(10)錠に差し込んだとき錠前のメカニズムが回転するように型取られた金属器具