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Glite Dictionary
to rest assured

to rest assured

35 3.7
Be sure that something will happen, so do not worry
  • idiom
  • Formal
translation icon : estar seguro de
  • We want people to rest assured that a lot is being done to protect them.

And please rest assured I will be texting Ryan back lol.

Examples

  • I'm not great at replying all the time, but rest assured that I am reading everything.

    Blog text (9)

  • You may rest assured that we will honour the traditions of Doylestown.

    The Brutalist (2024)

  • So you can rest assured that if you ask enough questions, he will show you who he is.

  • So rest assured, the clock is going to work.

  • You can rest assured: There is something going on!

    What in the World Are They Spraying? (2010)

  • You can rest assured that in the future I shall take my business elsewhere.

    I Wanna Hold Your Hand (1978)

  • When you set your priorities, rest assured that you will never get caught up during the process.

    Blog text (4)

  • If that's your concern, then you can rest assured I have no intention of firing you.

    The Invisible Man (2017)

  • If Romney wins by even a single vote, we can rest assured it was really a landslide!

    Blog text (13)

  • You can rest assured that your application will be processed on time.

Synonyms

to rest easy
vsto rest assured
  • Informal
16 4.2

Feel calm and not worried after someone reassures you

is used to tell someone not to worry because something is certain

Antonyms

to worry
∞ 1.0

To feel nervous or afraid about possible problems

doubt
∞ 1.6

A feeling of not being sure about something

How Reassured

positutely sure
  • Informal
9.8
to guarantee
∞ 2.8
to rest assured
  • Formal
35 3.7
to rest easy
  • Informal
16 4.2
don't sweat it
  • Informal
1 7.4

Surface Forms

rest assured infinitive
rested assured past
rested assured past participle
resting assured present participle
rests assured third person singular

Morphology

rest + assured

The meaning 'do not worry; be confident' is directly recoverable from combining 'rest' (relax/stop worrying) with 'assured' (certain/guaranteed): together they convey 'relax because it is certain'. This verb+adjective construction is a common, compositional pattern with equivalents in many languages, so a B1 learner who knows both constituents will very likely infer the MWE's meaning.

Etymology

Rest assured comes from the image of someone being told they can rest because another person has made things safe and certain, so they are assured. So it means 'don't worry' because the matter is taken care of.