vt.

1. 开……的锁
   She unlocked the door and turned the handle to open it.

   她打开门锁，转动把手开了门。

2. 开；开启
3. 揭开；表露
   He unlocked the secrets of his heart.

   他表露了他心中的秘密。

vi.

1. 开着；解开

v.

1. undo the lock of (something) using a key.
2. make newly available.