unlock

1. V-T If you unlock something such as a door, a room, or a container that has a lock, you open it using a key. 用钥匙打开

He unlocked the car and threw the coat on to the back seat. 他启动汽车，将外套扔到了后座。

2. V-T If you unlock the potential or the secrets of something or someone, you release them. 发掘 (潜力); 揭开 (秘密)

The point of the competition is to encourage all people to unlock their hidden potential. 竞赛的目的是鼓励所有人发掘其隐藏的潜力。