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set one's mind at rest

Idioms  

  1. Also, put one's mind at rest. Stop worrying, allay one's anxiety. For example, Your car's been found undamaged, so set your mind at rest. Also see lay at rest.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.