look into

look into idiom
Also, see into. Investigate, as in He promised to look into the new law, or We must see into the matter of the missing checks. The first term dates from the late 1500s, the variant from the mid-1800s.

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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