Unlock
/əˈnlɑk/
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Definition
(verb) To undo or open a lock or something locked by, for example, turning a key, or selecting a combination.
Sentence Examples
Give me a key, and I will unlock the universe.
Tom couldn't unlock the door because he had the wrong key.
CEFR Practice Quiz
I had to use a specific key to ____ the ancient wooden chest that I found in my grandfather's attic today.