key into
verb- To put (someone) into (a particular state, emotion etc.).
- To cohere with; to accord with, to be in keeping with.
- To make (someone) focus or concentrate on (something); to make (someone) understand. · Walter wasn't on the same page as the rest of us at first, but we talked about it and keyed him into it.
From the library
When Anne got home that night she stacked all her textbooks away in an old trunk in the attic, locked it, and threw the key into the blanket box.
He put the old brass key into the lock and turned it.
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