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master key

noun as in key opening all locks of a place

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You must search for the secret springs that govern his actions and for the master key that will unlock his heart.

Not since he had discovered the master-key of Evolution had Thyrsis come upon any set of ideas that meant so much to him.

The theory of the class struggle is the master key to the bewilderments and confusions of history.

This was the master-key to her behaviour, and once I had got it, which I soon did, it was easy to unlock her breast.

Look, only look into the closet; wait here a moment, and I'll fetch a master key that shall open every one of them.

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On this page you'll find 4 synonyms, antonyms, and words related to master key, such as: opener, passkey, pass'-partout, and skeleton key.

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