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. 用鈅匙打開

He unlocked the car and threw the coat on to the back seat. 他啓動汽車，將外套扔到了後座。

2. V-T If you unlock the potential or the secrets of something or someone, you release them. 發掘 (潛力); 揭開 (秘密)

The point of the competition is to encourage all people to unlock their hidden potential. 競賽的目的是鼓勵所有人發掘其隱藏的潛力。