put / set one's mind at rest / ease

/pˌʊt sˈɛt wˈɒnz mˈaɪnd at ɹˈɛst ˈiːz/

/pˌʊt sˈɛt wˈʌnz mˈaɪnd æt ɹˈɛst ˈiːz/

[phrase]

to put / set one's mind at rest / ease

[PHRASE]

to assure someone that they no longer need to worry about a particular person or thing

What is the origin of the idiom "put one's mind at rest" and when to use it?

The origin of the idiom "put one's mind at rest" can be traced to the concept of achieving mental calm and tranquility. The phrase draws upon the idea that when someone's mind is troubled or restless due to worries or anxieties, there is a need to address those concerns and provide reassurance.

Examples

1. Thanks for putting my mind at ease.

2. If Chris phones to say they arrived safely, that really puts my mind at rest.

3. The doctor is setting my mind at rest by explaining exactly what effect the drug may have on me.

4. It put my mind at ease.