unlock

US /ʌnˈlɑːk/
UK /ʌnˈlɑːk/
"unlock" picture
1.

to open something that is locked, or to make it possible to use something that was locked

:
I used the key to unlock the door.
Can you help me unlock my phone? I forgot the password.
2.

to discover or reveal something that was previously hidden or unknown

:
Researchers are trying to unlock the secrets of the universe.
The new evidence could unlock the mystery of the missing artifact.