see into

see into idiom
  1. Investigate; see look into.
  2. Understand the true character or nature of, as in Mother could see into Mary very well and knew exactly what she was up to. Shakespeare used this idiom in 2 Henry VI (3:1): “Well hath your Highness seen into this duke.”

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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