How to Say “Sleep Well” in Welsh

cysgwch yn dda
The Welsh phrase for "sleep well" is cysgwch yn dda.
This phrase is used to wish someone a good night's rest.

Which one should you use?

Cysgwch yn dda is the plural or formal command, whereas cysgw yn dda is the singular or informal command.

How does it change in a sentence?

The form cysgwch yn dda uses the plural/formal imperative.

Did you know?

  • In some Welsh communities, it is common to pair a wish for sleep with the phrase nos dawel, which means 'quiet night', emphasizing peace and silence over the quality of the sleep itself.
  • The word yn descends from the Proto-Indo-European root *h₁én, which is a distant relative of the English word 'in'.
  • The particle yn in cysgwch yn dda serves as a linker that turns the adjective 'good' into an adverb 'well'. This is a versatile tool in Welsh that handles many different grammatical roles.

Examples in context

  • Nos da!
    Goodnight!
  • Nos da, cysga'n dda.
    Goodnight, sleep well.

Example conversation

Dylan and Rhiannon are saying goodnight before going to their rooms.

  1. Dylan

    Dw i'n blino iawn heno.
    I am very tired tonight.
  2. Rhiannon

    Fi hefyd, Dylan.
    Me too, Dylan.
  3. Dylan

    Nos da, Rhiannon, cysgwch yn dda.
    Good night, Rhiannon, sleep well.
  4. Rhiannon

    Diolch, nos da i chwith.
    Thanks, good night to you.

Sources

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Amy Gabriella
Amy GabriellaHelp make this guide better. Spot a mistake, know another way to say it, or have an example from real life? Share it below.
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